64857493 has 8 divisors (see below), whose sum is σ = 67857408. Its totient is φ = 61872624.

The previous prime is 64857491. The next prime is 64857517. The reversal of 64857493 is 39475846.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 64857493 - 2¹ = 64857491 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64857491) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5580 + ... + 12682.

It is an arithmetic number, because the mean of its divisors is an integer number (8482176).

Almost surely, 2^64857493 is an apocalyptic number.

It is an amenable number.

64857493 is a deficient number, since it is larger than the sum of its proper divisors (2999915).

64857493 is a wasteful number, since it uses less digits than its factorization.

64857493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7523.

The product of its digits is 725760, while the sum is 46.

The square root of 64857493 is about 8053.4149899282. The cubic root of 64857493 is about 401.7785241593.

The spelling of 64857493 in words is "sixty-four million, eight hundred fifty-seven thousand, four hundred ninety-three".