64213923 has 16 divisors (see below), whose sum is σ = 86676480. Its totient is φ = 42284256.

The previous prime is 64213909. The next prime is 64213943. The reversal of 64213923 is 32931246.

It is not a de Polignac number, because 64213923 - 2¹⁶ = 64148387 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64213943) 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, 105486 + ... + 106092.

It is an arithmetic number, because the mean of its divisors is an integer number (5417280).

Almost surely, 2^64213923 is an apocalyptic number.

64213923 is a deficient number, since it is larger than the sum of its proper divisors (22462557).

64213923 is a wasteful number, since it uses less digits than its factorization.

64213923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 986.

The product of its digits is 7776, while the sum is 30.

The square root of 64213923 is about 8013.3590335140. The cubic root of 64213923 is about 400.4451772758.

The spelling of 64213923 in words is "sixty-four million, two hundred thirteen thousand, nine hundred twenty-three".