64189523 has 2 divisors, whose sum is σ = 64189524. Its totient is φ = 64189522.

The previous prime is 64189513. The next prime is 64189547. The reversal of 64189523 is 32598146.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64189523 - 2¹² = 64185427 is a prime.

It is not a weakly prime, because it can be changed into another prime (64189513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32094761 + 32094762.

It is an arithmetic number, because the mean of its divisors is an integer number (32094762).

Almost surely, 2^64189523 is an apocalyptic number.

64189523 is a deficient number, since it is larger than the sum of its proper divisors (1).

64189523 is an equidigital number, since it uses as much as digits as its factorization.

64189523 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 51840, while the sum is 38.

The square root of 64189523 is about 8011.8364311811. The cubic root of 64189523 is about 400.3944504775.

The spelling of 64189523 in words is "sixty-four million, one hundred eighty-nine thousand, five hundred twenty-three".