64386131 has 4 divisors (see below), whose sum is σ = 67185552. Its totient is φ = 61586712.

The previous prime is 64386103. The next prime is 64386143. The reversal of 64386131 is 13168346.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13168346 = 2 ⋅6584173.

It is a cyclic number.

It is not a de Polignac number, because 64386131 - 2⁶ = 64386067 is a prime.

It is a super-2 number, since 2×64386131² = 8291147730298322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64386181) 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, 1399676 + ... + 1399721.

It is an arithmetic number, because the mean of its divisors is an integer number (16796388).

Almost surely, 2^64386131 is an apocalyptic number.

64386131 is a deficient number, since it is larger than the sum of its proper divisors (2799421).

64386131 is a wasteful number, since it uses less digits than its factorization.

64386131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2799420.

The product of its digits is 10368, while the sum is 32.

The square root of 64386131 is about 8024.0968962245. The cubic root of 64386131 is about 400.8028271766.

The spelling of 64386131 in words is "sixty-four million, three hundred eighty-six thousand, one hundred thirty-one".