64994073 has 16 divisors (see below), whose sum is σ = 89702400. Its totient is φ = 41815440.

The previous prime is 64994071. The next prime is 64994081. The reversal of 64994073 is 37049946.

It is not a de Polignac number, because 64994073 - 2¹ = 64994071 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64994071) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43818 + ... + 45276.

It is an arithmetic number, because the mean of its divisors is an integer number (5606400).

Almost surely, 2^64994073 is an apocalyptic number.

It is an amenable number.

64994073 is a deficient number, since it is larger than the sum of its proper divisors (24708327).

64994073 is a wasteful number, since it uses less digits than its factorization.

64994073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1972.

The product of its (nonzero) digits is 163296, while the sum is 42.

The square root of 64994073 is about 8061.8901629829. The cubic root of 64994073 is about 402.0603545430.

The spelling of 64994073 in words is "sixty-four million, nine hundred ninety-four thousand, seventy-three".