76615009 has 3 divisors (see below), whose sum is σ = 76623763. Its totient is φ = 76606256.

The previous prime is 76615003. The next prime is 76615031. The reversal of 76615009 is 90051667.

The square root of 76615009 is 8753.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 90051667 = 5659 ⋅15913.

It can be written as a sum of positive squares in only one way, i.e., 66830625 + 9784384 = 8175^2 + 3128^2 .

It is not a de Polignac number, because 76615009 - 2⁵ = 76614977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (76615003) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 4377 + ... + 13129.

Almost surely, 2^76615009 is an apocalyptic number.

76615009 is the 8753-rd square number.

76615009 is the 4377-th centered octagonal number.

It is an amenable number.

76615009 is a deficient number, since it is larger than the sum of its proper divisors (8754).

76615009 is an frugal number, since it uses more digits than its factorization.

76615009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17506 (or 8753 counting only the distinct ones).

The product of its (nonzero) digits is 11340, while the sum is 34.

The cubic root of 76615009 is about 424.7218646153.

The spelling of 76615009 in words is "seventy-six million, six hundred fifteen thousand, nine".