76912081 has 4 divisors (see below), whose sum is σ = 76930612. Its totient is φ = 76893552.

The previous prime is 76912067. The next prime is 76912091. The reversal of 76912081 is 18021967.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 60840000 + 16072081 = 7800^2 + 4009^2 .

It is a cyclic number.

It is not a de Polignac number, because 76912081 - 2¹¹ = 76910033 is a prime.

It is a super-2 number, since 2×76912081² = 11830936407501122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (76912021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 151 + ... + 12403.

It is an arithmetic number, because the mean of its divisors is an integer number (19232653).

Almost surely, 2^76912081 is an apocalyptic number.

It is an amenable number.

76912081 is a deficient number, since it is larger than the sum of its proper divisors (18531).

76912081 is a wasteful number, since it uses less digits than its factorization.

76912081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18530.

The product of its (nonzero) digits is 6048, while the sum is 34.

The square root of 76912081 is about 8769.9533066032. The cubic root of 76912081 is about 425.2701046565.

The spelling of 76912081 in words is "seventy-six million, nine hundred twelve thousand, eighty-one".