64845923 has 2 divisors, whose sum is σ = 64845924. Its totient is φ = 64845922.

The previous prime is 64845919. The next prime is 64845931. The reversal of 64845923 is 32954846.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64845923 - 2² = 64845919 is a prime.

It is not a weakly prime, because it can be changed into another prime (64845323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32422961 + 32422962.

It is an arithmetic number, because the mean of its divisors is an integer number (32422962).

Almost surely, 2^64845923 is an apocalyptic number.

64845923 is a deficient number, since it is larger than the sum of its proper divisors (1).

64845923 is an equidigital number, since it uses as much as digits as its factorization.

64845923 is an evil number, because the sum of its binary digits is even.

The product of its digits is 207360, while the sum is 41.

The square root of 64845923 is about 8052.6966290802. The cubic root of 64845923 is about 401.7546314998.

The spelling of 64845923 in words is "sixty-four million, eight hundred forty-five thousand, nine hundred twenty-three".