64857393 has 12 divisors (see below), whose sum is σ = 98613840. Its totient is φ = 40962456.

The previous prime is 64857389. The next prime is 64857437. The reversal of 64857393 is 39375846.

It is not a de Polignac number, because 64857393 - 2² = 64857389 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (64857383) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 189471 + ... + 189812.

It is an arithmetic number, because the mean of its divisors is an integer number (8217820).

Almost surely, 2^64857393 is an apocalyptic number.

It is an amenable number.

64857393 is a deficient number, since it is larger than the sum of its proper divisors (33756447).

64857393 is a wasteful number, since it uses less digits than its factorization.

64857393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 379308 (or 379305 counting only the distinct ones).

The product of its digits is 544320, while the sum is 45.

The square root of 64857393 is about 8053.4087813795. The cubic root of 64857393 is about 401.7783176662.

The spelling of 64857393 in words is "sixty-four million, eight hundred fifty-seven thousand, three hundred ninety-three".