609249665 has 16 divisors (see below), whose sum is σ = 755467776. Its totient is φ = 471187200.

The previous prime is 609249643. The next prime is 609249677. The reversal of 609249665 is 566942906.

It is not a de Polignac number, because 609249665 - 2⁸ = 609249409 is a prime.

It is a super-2 number, since 2×609249665² = 742370308605224450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 239450 + ... + 241980.

It is an arithmetic number, because the mean of its divisors is an integer number (47216736).

Almost surely, 2^609249665 is an apocalyptic number.

It is an amenable number.

609249665 is a deficient number, since it is larger than the sum of its proper divisors (146218111).

609249665 is a wasteful number, since it uses less digits than its factorization.

609249665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4120.

The product of its (nonzero) digits is 699840, while the sum is 47.

The square root of 609249665 is about 24682.9833083442. The cubic root of 609249665 is about 847.7447319837.

The spelling of 609249665 in words is "six hundred nine million, two hundred forty-nine thousand, six hundred sixty-five".