76345809 has 24 divisors (see below), whose sum is σ = 108034080. Its totient is φ = 47944512.

The previous prime is 76345771. The next prime is 76345847. The reversal of 76345809 is 90854367.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (76345771) and next prime (76345847).

It is a de Polignac number, because none of the positive numbers 2^k-76345809 is a prime.

It is not an unprimeable number, because it can be changed into a prime (76345859) 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 23 ways as a sum of consecutive naturals, for example, 115522 + ... + 116180.

It is an arithmetic number, because the mean of its divisors is an integer number (4501420).

Almost surely, 2^76345809 is an apocalyptic number.

It is an amenable number.

76345809 is a deficient number, since it is larger than the sum of its proper divisors (31688271).

76345809 is a wasteful number, since it uses less digits than its factorization.

76345809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 781 (or 758 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 42.

The square root of 76345809 is about 8737.6088834417. The cubic root of 76345809 is about 424.2238364374.

The spelling of 76345809 in words is "seventy-six million, three hundred forty-five thousand, eight hundred nine".