64406983 has 4 divisors (see below), whose sum is σ = 64734120. Its totient is φ = 64079848.

The previous prime is 64406981. The next prime is 64406989. The reversal of 64406983 is 38960446.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 64406983 - 2¹ = 64406981 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 (64406981) 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, 163273 + ... + 163666.

It is an arithmetic number, because the mean of its divisors is an integer number (16183530).

Almost surely, 2^64406983 is an apocalyptic number.

64406983 is a deficient number, since it is larger than the sum of its proper divisors (327137).

64406983 is a wasteful number, since it uses less digits than its factorization.

64406983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327136.

The product of its (nonzero) digits is 124416, while the sum is 40.

The square root of 64406983 is about 8025.3961272949. The cubic root of 64406983 is about 400.8460903161.

The spelling of 64406983 in words is "sixty-four million, four hundred six thousand, nine hundred eighty-three".