64900137 has 4 divisors (see below), whose sum is σ = 86533520. Its totient is φ = 43266756.

The previous prime is 64900117. The next prime is 64900141. The reversal of 64900137 is 73100946.

It is a happy number.

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 not a de Polignac number, because 64900137 - 2⁷ = 64900009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64900117) 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, 10816687 + ... + 10816692.

It is an arithmetic number, because the mean of its divisors is an integer number (21633380).

Almost surely, 2^64900137 is an apocalyptic number.

It is an amenable number.

64900137 is a deficient number, since it is larger than the sum of its proper divisors (21633383).

64900137 is a wasteful number, since it uses less digits than its factorization.

64900137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21633382.

The product of its (nonzero) digits is 4536, while the sum is 30.

The square root of 64900137 is about 8056.0621273672. The cubic root of 64900137 is about 401.8665617365.

The spelling of 64900137 in words is "sixty-four million, nine hundred thousand, one hundred thirty-seven".