64131983 has 2 divisors, whose sum is σ = 64131984. Its totient is φ = 64131982.

The previous prime is 64131943. The next prime is 64132031. The reversal of 64131983 is 38913146.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64131983 - 2¹⁰ = 64130959 is a prime.

It is a super-2 number, since 2×64131983² = 8225822487024578, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64131943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32065991 + 32065992.

It is an arithmetic number, because the mean of its divisors is an integer number (32065992).

Almost surely, 2^64131983 is an apocalyptic number.

64131983 is a deficient number, since it is larger than the sum of its proper divisors (1).

64131983 is an equidigital number, since it uses as much as digits as its factorization.

64131983 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15552, while the sum is 35.

The square root of 64131983 is about 8008.2446890689. The cubic root of 64131983 is about 400.2747757858.

The spelling of 64131983 in words is "sixty-four million, one hundred thirty-one thousand, nine hundred eighty-three".