65439923 has 4 divisors (see below), whose sum is σ = 65689008. Its totient is φ = 65190840.

The previous prime is 65439911. The next prime is 65439929. The reversal of 65439923 is 32993456.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 65439923 - 2⁶ = 65439859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65439929) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 124148 + ... + 124673.

It is an arithmetic number, because the mean of its divisors is an integer number (16422252).

Almost surely, 2^65439923 is an apocalyptic number.

65439923 is a deficient number, since it is larger than the sum of its proper divisors (249085).

65439923 is a wasteful number, since it uses less digits than its factorization.

65439923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249084.

The product of its digits is 174960, while the sum is 41.

The square root of 65439923 is about 8089.4946072051. The cubic root of 65439923 is about 402.9776190450.

The spelling of 65439923 in words is "sixty-five million, four hundred thirty-nine thousand, nine hundred twenty-three".