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76848481 = 397193573
BaseRepresentation
bin1001001010010…
…01110101100001
312100121022022001
410211021311201
5124133122411
611343044001
71622126023
oct445116541
9170538261
1076848481
113a419446
12218a0601
1312bc8a98
14a2c6013
156b2edc1
hex4949d61

76848481 has 4 divisors (see below), whose sum is σ = 77042452. Its totient is φ = 76654512.

The previous prime is 76848479. The next prime is 76848491. The reversal of 76848481 is 18484867.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18484867 = 37499591.

It can be written as a sum of positive squares in 2 ways, for example, as 60202081 + 16646400 = 7759^2 + 4080^2 .

It is a cyclic number.

It is not a de Polignac number, because 76848481 - 21 = 76848479 is a prime.

It is a super-2 number, since 2×768484812 = 11811378064014722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (76848491) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 96390 + ... + 97183.

It is an arithmetic number, because the mean of its divisors is an integer number (19260613).

Almost surely, 276848481 is an apocalyptic number.

It is an amenable number.

76848481 is a deficient number, since it is larger than the sum of its proper divisors (193971).

76848481 is a wasteful number, since it uses less digits than its factorization.

76848481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193970.

The product of its digits is 344064, while the sum is 46.

The square root of 76848481 is about 8766.3265396630. The cubic root of 76848481 is about 425.1528511336.

The spelling of 76848481 in words is "seventy-six million, eight hundred forty-eight thousand, four hundred eighty-one".

Divisors: 1 397 193573 76848481