64936969 has 2 divisors, whose sum is σ = 64936970. Its totient is φ = 64936968.

The previous prime is 64936967. The next prime is 64936987. The reversal of 64936969 is 96963946.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52012944 + 12924025 = 7212^2 + 3595^2 .

It is a cyclic number.

It is not a de Polignac number, because 64936969 - 2¹ = 64936967 is a prime.

It is a super-2 number, since 2×64936969² = 8433619885813922, which contains 22 as substring.

Together with 64936967, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (64936967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32468484 + 32468485.

It is an arithmetic number, because the mean of its divisors is an integer number (32468485).

Almost surely, 2^64936969 is an apocalyptic number.

It is an amenable number.

64936969 is a deficient number, since it is larger than the sum of its proper divisors (1).

64936969 is an equidigital number, since it uses as much as digits as its factorization.

64936969 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1889568, while the sum is 52.

The square root of 64936969 is about 8058.3477835100. The cubic root of 64936969 is about 401.9425695372.

The spelling of 64936969 in words is "sixty-four million, nine hundred thirty-six thousand, nine hundred sixty-nine".