76809577 has 8 divisors (see below), whose sum is σ = 83082440. Its totient is φ = 70588800.

The previous prime is 76809569. The next prime is 76809613. The reversal of 76809577 is 77590867.

It can be written as a sum of positive squares in 4 ways, for example, as 15594601 + 61214976 = 3949^2 + 7824^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 76809577 - 2³ = 76809569 is a prime.

It is a super-2 number, since 2×76809577² = 11799422237837858, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 76809577.

It is not an unprimeable number, because it can be changed into a prime (76809517) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9924 + ... + 15877.

It is an arithmetic number, because the mean of its divisors is an integer number (10385305).

Almost surely, 2^76809577 is an apocalyptic number.

It is an amenable number.

76809577 is a deficient number, since it is larger than the sum of its proper divisors (6272863).

76809577 is a wasteful number, since it uses less digits than its factorization.

76809577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26043.

The product of its (nonzero) digits is 740880, while the sum is 49.

The square root of 76809577 is about 8764.1073133549. The cubic root of 76809577 is about 425.0810954823.

The spelling of 76809577 in words is "seventy-six million, eight hundred nine thousand, five hundred seventy-seven".