76432809 has 4 divisors (see below), whose sum is σ = 101910416. Its totient is φ = 50955204.

The previous prime is 76432771. The next prime is 76432813. The reversal of 76432809 is 90823467.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 76432809 - 2⁹ = 76432297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (76432009) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12738799 + ... + 12738804.

It is an arithmetic number, because the mean of its divisors is an integer number (25477604).

Almost surely, 2^76432809 is an apocalyptic number.

It is an amenable number.

76432809 is a deficient number, since it is larger than the sum of its proper divisors (25477607).

76432809 is a wasteful number, since it uses less digits than its factorization.

76432809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25477606.

The product of its (nonzero) digits is 72576, while the sum is 39.

The square root of 76432809 is about 8742.5859446733. The cubic root of 76432809 is about 424.3849169376.

The spelling of 76432809 in words is "seventy-six million, four hundred thirty-two thousand, eight hundred nine".