76831609 has 16 divisors (see below), whose sum is σ = 81782784. Its totient is φ = 72072000.

The previous prime is 76831603. The next prime is 76831627. The reversal of 76831609 is 90613867.

It is a cyclic number.

It is not a de Polignac number, because 76831609 - 2¹⁷ = 76700537 is a prime.

It is a super-2 number, since 2×76831609² = 11806192283057762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (76831603) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 165712 + ... + 166174.

It is an arithmetic number, because the mean of its divisors is an integer number (5111424).

Almost surely, 2^76831609 is an apocalyptic number.

It is an amenable number.

76831609 is a deficient number, since it is larger than the sum of its proper divisors (4951175).

76831609 is a wasteful number, since it uses less digits than its factorization.

76831609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 648.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 76831609 is about 8765.3641681336. The cubic root of 76831609 is about 425.1217349084.

The spelling of 76831609 in words is "seventy-six million, eight hundred thirty-one thousand, six hundred nine".