64999523 has 2 divisors, whose sum is σ = 64999524. Its totient is φ = 64999522.

The previous prime is 64999481. The next prime is 64999537. The reversal of 64999523 is 32599946.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64999523 - 2⁸ = 64999267 is a prime.

It is not a weakly prime, because it can be changed into another prime (64999223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32499761 + 32499762.

It is an arithmetic number, because the mean of its divisors is an integer number (32499762).

Almost surely, 2^64999523 is an apocalyptic number.

64999523 is a deficient number, since it is larger than the sum of its proper divisors (1).

64999523 is an equidigital number, since it uses as much as digits as its factorization.

64999523 is an evil number, because the sum of its binary digits is even.

The product of its digits is 524880, while the sum is 47.

The square root of 64999523 is about 8062.2281659601. The cubic root of 64999523 is about 402.0715923251.

The spelling of 64999523 in words is "sixty-four million, nine hundred ninety-nine thousand, five hundred twenty-three".