64385493 has 4 divisors (see below), whose sum is σ = 85847328. Its totient is φ = 42923660.

The previous prime is 64385473. The next prime is 64385521. The reversal of 64385493 is 39458346.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 64385493 - 2⁶ = 64385429 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64385413) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10730913 + ... + 10730918.

It is an arithmetic number, because the mean of its divisors is an integer number (21461832).

Almost surely, 2^64385493 is an apocalyptic number.

It is an amenable number.

64385493 is a deficient number, since it is larger than the sum of its proper divisors (21461835).

64385493 is a wasteful number, since it uses less digits than its factorization.

64385493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21461834.

The product of its digits is 311040, while the sum is 42.

The square root of 64385493 is about 8024.0571408733. The cubic root of 64385493 is about 400.8015033250.

The spelling of 64385493 in words is "sixty-four million, three hundred eighty-five thousand, four hundred ninety-three".