76809705 has 32 divisors (see below), whose sum is σ = 143328000. Its totient is φ = 35110656.

The previous prime is 76809701. The next prime is 76809721. The reversal of 76809705 is 50790867.

It is not a de Polignac number, because 76809705 - 2² = 76809701 is a prime.

It is not an unprimeable number, because it can be changed into a prime (76809701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2320 + ... + 12609.

It is an arithmetic number, because the mean of its divisors is an integer number (4479000).

Almost surely, 2^76809705 is an apocalyptic number.

It is an amenable number.

76809705 is a deficient number, since it is larger than the sum of its proper divisors (66518295).

76809705 is a wasteful number, since it uses less digits than its factorization.

76809705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14958 (or 14944 counting only the distinct ones).

The product of its (nonzero) digits is 105840, while the sum is 42.

The square root of 76809705 is about 8764.1146158639. The cubic root of 76809705 is about 425.0813316089.

The spelling of 76809705 in words is "seventy-six million, eight hundred nine thousand, seven hundred five".