64363931 has 2 divisors, whose sum is σ = 64363932. Its totient is φ = 64363930.

The previous prime is 64363903. The next prime is 64363933. The reversal of 64363931 is 13936346.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64363931 is a prime.

It is a super-2 number, since 2×64363931² = 8285431227545522, which contains 22 as substring.

Together with 64363933, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 64363891 and 64363900.

It is not a weakly prime, because it can be changed into another prime (64363933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32181965 + 32181966.

It is an arithmetic number, because the mean of its divisors is an integer number (32181966).

Almost surely, 2^64363931 is an apocalyptic number.

64363931 is a deficient number, since it is larger than the sum of its proper divisors (1).

64363931 is an equidigital number, since it uses as much as digits as its factorization.

64363931 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34992, while the sum is 35.

The square root of 64363931 is about 8022.7134437172. The cubic root of 64363931 is about 400.7567569776.

The spelling of 64363931 in words is "sixty-four million, three hundred sixty-three thousand, nine hundred thirty-one".