64139703 has 32 divisors (see below), whose sum is σ = 91483392. Its totient is φ = 39916800.

The previous prime is 64139693. The next prime is 64139711. The reversal of 64139703 is 30793146.

It is not a de Polignac number, because 64139703 - 2⁸ = 64139447 is a prime.

It is a super-2 number, since 2×64139703² = 8227803001856418, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64139723) 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, 354273 + ... + 354453.

It is an arithmetic number, because the mean of its divisors is an integer number (2858856).

Almost surely, 2^64139703 is an apocalyptic number.

64139703 is a deficient number, since it is larger than the sum of its proper divisors (27343689).

64139703 is a wasteful number, since it uses less digits than its factorization.

64139703 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335.

The product of its (nonzero) digits is 13608, while the sum is 33.

The square root of 64139703 is about 8008.7266778184. The cubic root of 64139703 is about 400.2908364009.

The spelling of 64139703 in words is "sixty-four million, one hundred thirty-nine thousand, seven hundred three".