64915249 has 9 divisors (see below), whose sum is σ = 75579321. Its totient is φ = 55593300.

The previous prime is 64915247. The next prime is 64915273. The reversal of 64915249 is 94251946.

The square root of 64915249 is 8057.

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

It is not a de Polignac number, because 64915249 - 2¹ = 64915247 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64915241) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 55824 + ... + 56974.

Almost surely, 2^64915249 is an apocalyptic number.

64915249 is the 8057-th square number.

64915249 is the 4029-th centered octagonal number.

It is an amenable number.

64915249 is a deficient number, since it is larger than the sum of its proper divisors (10664072).

64915249 is an frugal number, since it uses more digits than its factorization.

64915249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2316 (or 1158 counting only the distinct ones).

The product of its digits is 77760, while the sum is 40.

The cubic root of 64915249 is about 401.8977508652.

The spelling of 64915249 in words is "sixty-four million, nine hundred fifteen thousand, two hundred forty-nine".