64040623 has 2 divisors, whose sum is σ = 64040624. Its totient is φ = 64040622.

The previous prime is 64040597. The next prime is 64040633. The reversal of 64040623 is 32604046.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64040623 - 2⁵ = 64040591 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64040633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32020311 + 32020312.

It is an arithmetic number, because the mean of its divisors is an integer number (32020312).

Almost surely, 2^64040623 is an apocalyptic number.

64040623 is a deficient number, since it is larger than the sum of its proper divisors (1).

64040623 is an equidigital number, since it uses as much as digits as its factorization.

64040623 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 64040623 is about 8002.5385347401. The cubic root of 64040623 is about 400.0846133502.

Adding to 64040623 its reverse (32604046), we get a palindrome (96644669).

The spelling of 64040623 in words is "sixty-four million, forty thousand, six hundred twenty-three".