64613923 has 32 divisors (see below), whose sum is σ = 79252992. Its totient is φ = 51955200.

The previous prime is 64613921. The next prime is 64613977. The reversal of 64613923 is 32931646.

It is a happy number.

It is not a de Polignac number, because 64613923 - 2¹ = 64613921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64613921) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 356893 + ... + 357073.

It is an arithmetic number, because the mean of its divisors is an integer number (2476656).

Almost surely, 2^64613923 is an apocalyptic number.

64613923 is a deficient number, since it is larger than the sum of its proper divisors (14639069).

64613923 is a wasteful number, since it uses less digits than its factorization.

64613923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315.

The product of its digits is 23328, while the sum is 34.

The square root of 64613923 is about 8038.2786092546. The cubic root of 64613923 is about 401.2749382636.

It can be divided in two parts, 64613 and 923, that added together give a 16-th power (65536 = 2¹⁶).

The spelling of 64613923 in words is "sixty-four million, six hundred thirteen thousand, nine hundred twenty-three".