64999001 has 4 divisors (see below), whose sum is σ = 65049600. Its totient is φ = 64948404.

The previous prime is 64998959. The next prime is 64999027. The reversal of 64999001 is 10099946.

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 a de Polignac number, because none of the positive numbers 2^k-64999001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64999201) 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, 23321 + ... + 25958.

It is an arithmetic number, because the mean of its divisors is an integer number (16262400).

Almost surely, 2^64999001 is an apocalyptic number.

It is an amenable number.

64999001 is a deficient number, since it is larger than the sum of its proper divisors (50599).

64999001 is a wasteful number, since it uses less digits than its factorization.

64999001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50598.

The product of its (nonzero) digits is 17496, while the sum is 38.

The square root of 64999001 is about 8062.1957927106. The cubic root of 64999001 is about 402.0705159996.

The spelling of 64999001 in words is "sixty-four million, nine hundred ninety-nine thousand, one".