64450939 has 4 divisors (see below), whose sum is σ = 73658224. Its totient is φ = 55243656.

The previous prime is 64450933. The next prime is 64450943. The reversal of 64450939 is 93905446.

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 64450939 - 2⁹ = 64450427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64450933) 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, 4603632 + ... + 4603645.

It is an arithmetic number, because the mean of its divisors is an integer number (18414556).

Almost surely, 2^64450939 is an apocalyptic number.

64450939 is a deficient number, since it is larger than the sum of its proper divisors (9207285).

64450939 is an equidigital number, since it uses as much as digits as its factorization.

64450939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9207284.

The product of its (nonzero) digits is 116640, while the sum is 40.

The square root of 64450939 is about 8028.1342166160. The cubic root of 64450939 is about 400.9372584014.

The spelling of 64450939 in words is "sixty-four million, four hundred fifty thousand, nine hundred thirty-nine".