64967431 has 2 divisors, whose sum is σ = 64967432. Its totient is φ = 64967430.

The previous prime is 64967423. The next prime is 64967443. The reversal of 64967431 is 13476946.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64967431 - 2³ = 64967423 is a prime.

It is a super-2 number, since 2×64967431² = 8441534181479522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64967471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32483715 + 32483716.

It is an arithmetic number, because the mean of its divisors is an integer number (32483716).

Almost surely, 2^64967431 is an apocalyptic number.

64967431 is a deficient number, since it is larger than the sum of its proper divisors (1).

64967431 is an equidigital number, since it uses as much as digits as its factorization.

64967431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108864, while the sum is 40.

The square root of 64967431 is about 8060.2376515832. The cubic root of 64967431 is about 402.0054102718.

The spelling of 64967431 in words is "sixty-four million, nine hundred sixty-seven thousand, four hundred thirty-one".