64139067 has 16 divisors (see below), whose sum is σ = 97044480. Its totient is φ = 41848776.

The previous prime is 64139059. The next prime is 64139069. The reversal of 64139067 is 76093146.

64139067 is a `hidden beast` number, since 641 + 3 + 9 + 0 + 6 + 7 = 666.

It is not a de Polignac number, because 64139067 - 2³ = 64139059 is a prime.

It is a super-2 number, since 2×64139067² = 8227639831260978, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (64139069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24003 + ... + 26540.

It is an arithmetic number, because the mean of its divisors is an integer number (6065280).

Almost surely, 2^64139067 is an apocalyptic number.

64139067 is a deficient number, since it is larger than the sum of its proper divisors (32905413).

64139067 is a wasteful number, since it uses less digits than its factorization.

64139067 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50599 (or 50593 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 64139067 is about 8008.6869710334. The cubic root of 64139067 is about 400.2895133212.

The spelling of 64139067 in words is "sixty-four million, one hundred thirty-nine thousand, sixty-seven".