64415623 has 2 divisors, whose sum is σ = 64415624. Its totient is φ = 64415622.

The previous prime is 64415509. The next prime is 64415627. The reversal of 64415623 is 32651446.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64415623 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64415627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32207811 + 32207812.

It is an arithmetic number, because the mean of its divisors is an integer number (32207812).

Almost surely, 2^64415623 is an apocalyptic number.

64415623 is a deficient number, since it is larger than the sum of its proper divisors (1).

64415623 is an equidigital number, since it uses as much as digits as its factorization.

64415623 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17280, while the sum is 31.

The square root of 64415623 is about 8025.9344004296. The cubic root of 64415623 is about 400.8640136075.

The spelling of 64415623 in words is "sixty-four million, four hundred fifteen thousand, six hundred twenty-three".