64839073 has 16 divisors (see below), whose sum is σ = 72479232. Its totient is φ = 57600000.

The previous prime is 64839067. The next prime is 64839083. The reversal of 64839073 is 37093846.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64839073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64839083) 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, 100833 + ... + 101473.

It is an arithmetic number, because the mean of its divisors is an integer number (4529952).

Almost surely, 2^64839073 is an apocalyptic number.

It is an amenable number.

64839073 is a deficient number, since it is larger than the sum of its proper divisors (7640159).

64839073 is a wasteful number, since it uses less digits than its factorization.

64839073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 936.

The product of its (nonzero) digits is 108864, while the sum is 40.

The square root of 64839073 is about 8052.2712944858. The cubic root of 64839073 is about 401.7404845496.

The spelling of 64839073 in words is "sixty-four million, eight hundred thirty-nine thousand, seventy-three".