64923261 has 16 divisors (see below), whose sum is σ = 93494016. Its totient is φ = 39836736.

The previous prime is 64923259. The next prime is 64923263. The reversal of 64923261 is 16232946.

It is an interprime number because it is at equal distance from previous prime (64923259) and next prime (64923263).

It is not a de Polignac number, because 64923261 - 2¹ = 64923259 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64923263) 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, 12316 + ... + 16778.

It is an arithmetic number, because the mean of its divisors is an integer number (5843376).

Almost surely, 2^64923261 is an apocalyptic number.

It is an amenable number.

64923261 is a deficient number, since it is larger than the sum of its proper divisors (28570755).

64923261 is a wasteful number, since it uses less digits than its factorization.

64923261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4852.

The product of its digits is 15552, while the sum is 33.

The square root of 64923261 is about 8057.4971920566. The cubic root of 64923261 is about 401.9142845886.

The spelling of 64923261 in words is "sixty-four million, nine hundred twenty-three thousand, two hundred sixty-one".