64492973 has 4 divisors (see below), whose sum is σ = 67887360. Its totient is φ = 61098588.

The previous prime is 64492963. The next prime is 64493017. The reversal of 64492973 is 37929446.

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, and also an emirpimes, since its reverse is a distinct semiprime: 37929446 = 2 ⋅18964723.

It is a cyclic number.

It is not a de Polignac number, because 64492973 - 2⁴ = 64492957 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 (64492903) 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, 1697165 + ... + 1697202.

It is an arithmetic number, because the mean of its divisors is an integer number (16971840).

Almost surely, 2^64492973 is an apocalyptic number.

It is an amenable number.

64492973 is a deficient number, since it is larger than the sum of its proper divisors (3394387).

64492973 is a wasteful number, since it uses less digits than its factorization.

64492973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3394386.

The product of its digits is 326592, while the sum is 44.

The square root of 64492973 is about 8030.7517082774. The cubic root of 64492973 is about 401.0244013484.

The spelling of 64492973 in words is "sixty-four million, four hundred ninety-two thousand, nine hundred seventy-three".