64123139 has 8 divisors (see below), whose sum is σ = 66766560. Its totient is φ = 61531200.

The previous prime is 64123123. The next prime is 64123151. The reversal of 64123139 is 93132146.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 64123139 - 2⁴ = 64123123 is a prime.

It is a super-2 number, since 2×64123139² = 8223553910426642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64123639) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10319 + ... + 15320.

It is an arithmetic number, because the mean of its divisors is an integer number (8345820).

Almost surely, 2^64123139 is an apocalyptic number.

64123139 is a deficient number, since it is larger than the sum of its proper divisors (2643421).

64123139 is a wasteful number, since it uses less digits than its factorization.

64123139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25741.

The product of its digits is 3888, while the sum is 29.

The square root of 64123139 is about 8007.6924891007. The cubic root of 64123139 is about 400.2563752276.

The spelling of 64123139 in words is "sixty-four million, one hundred twenty-three thousand, one hundred thirty-nine".