76997409 has 8 divisors (see below), whose sum is σ = 103572192. Its totient is φ = 50877120.

The previous prime is 76997383. The next prime is 76997447. The reversal of 76997409 is 90479967.

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

It is not a de Polignac number, because 76997409 - 2⁸ = 76997153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (76997449) 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, 113227 + ... + 113904.

It is an arithmetic number, because the mean of its divisors is an integer number (12946524).

Almost surely, 2^76997409 is an apocalyptic number.

It is an amenable number.

76997409 is a deficient number, since it is larger than the sum of its proper divisors (26574783).

76997409 is a wasteful number, since it uses less digits than its factorization.

76997409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227247.

The product of its (nonzero) digits is 857304, while the sum is 51.

The square root of 76997409 is about 8774.8167502233. The cubic root of 76997409 is about 425.4273146202.

The spelling of 76997409 in words is "seventy-six million, nine hundred ninety-seven thousand, four hundred nine".