76909491 has 6 divisors (see below), whose sum is σ = 111091500. Its totient is φ = 51272988.

The previous prime is 76909487. The next prime is 76909517. The reversal of 76909491 is 19490967.

76909491 is a `hidden beast` number, since 76 + 90 + 9 + 491 = 666.

It is not a de Polignac number, because 76909491 - 2² = 76909487 is a prime.

It is not an unprimeable number, because it can be changed into a prime (76909451) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4272741 + ... + 4272758.

It is an arithmetic number, because the mean of its divisors is an integer number (18515250).

Almost surely, 2^76909491 is an apocalyptic number.

76909491 is a deficient number, since it is larger than the sum of its proper divisors (34182009).

76909491 is a wasteful number, since it uses less digits than its factorization.

76909491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8545505 (or 8545502 counting only the distinct ones).

The product of its (nonzero) digits is 122472, while the sum is 45.

The square root of 76909491 is about 8769.8056420881. The cubic root of 76909491 is about 425.2653309724.

The spelling of 76909491 in words is "seventy-six million, nine hundred nine thousand, four hundred ninety-one".