64249623 has 12 divisors (see below), whose sum is σ = 93058680. Its totient is φ = 42716016.

The previous prime is 64249609. The next prime is 64249663. The reversal of 64249623 is 32694246.

64249623 is a `hidden beast` number, since 6 + 4 + 24 + 9 + 623 = 666.

It is not a de Polignac number, because 64249623 - 2²⁵ = 30695191 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64249663) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6213 + ... + 12926.

It is an arithmetic number, because the mean of its divisors is an integer number (7754890).

Almost surely, 2^64249623 is an apocalyptic number.

64249623 is a deficient number, since it is larger than the sum of its proper divisors (28809057).

64249623 is a wasteful number, since it uses less digits than its factorization.

64249623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19518 (or 19515 counting only the distinct ones).

The product of its digits is 62208, while the sum is 36.

The square root of 64249623 is about 8015.5862542923. The cubic root of 64249623 is about 400.5193732534.

The spelling of 64249623 in words is "sixty-four million, two hundred forty-nine thousand, six hundred twenty-three".