64624423 has 2 divisors, whose sum is σ = 64624424. Its totient is φ = 64624422.

The previous prime is 64624369. The next prime is 64624433. The reversal of 64624423 is 32442646.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64624423 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64624433) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32312211 + 32312212.

It is an arithmetic number, because the mean of its divisors is an integer number (32312212).

Almost surely, 2^64624423 is an apocalyptic number.

64624423 is a deficient number, since it is larger than the sum of its proper divisors (1).

64624423 is an equidigital number, since it uses as much as digits as its factorization.

64624423 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27648, while the sum is 31.

The square root of 64624423 is about 8038.9317076338. The cubic root of 64624423 is about 401.2966733038.

The spelling of 64624423 in words is "sixty-four million, six hundred twenty-four thousand, four hundred twenty-three".