64139135 has 4 divisors (see below), whose sum is σ = 76966968. Its totient is φ = 51311304.

The previous prime is 64139087. The next prime is 64139149. The reversal of 64139135 is 53193146.

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 64139135 - 2⁶ = 64139071 is a prime.

It is a super-2 number, since 2×64139135² = 8227657277096450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6413909 + ... + 6413918.

It is an arithmetic number, because the mean of its divisors is an integer number (19241742).

Almost surely, 2^64139135 is an apocalyptic number.

64139135 is a deficient number, since it is larger than the sum of its proper divisors (12827833).

64139135 is a wasteful number, since it uses less digits than its factorization.

64139135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12827832.

The product of its digits is 9720, while the sum is 32.

The square root of 64139135 is about 8008.6912164223. The cubic root of 64139135 is about 400.2896547830.

The spelling of 64139135 in words is "sixty-four million, one hundred thirty-nine thousand, one hundred thirty-five".