64878937 has 8 divisors (see below), whose sum is σ = 66189600. Its totient is φ = 63575424.

The previous prime is 64878917. The next prime is 64878949. The reversal of 64878937 is 73987846.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 64878937 - 2¹⁹ = 64354649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64878917) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18889 + ... + 22057.

It is an arithmetic number, because the mean of its divisors is an integer number (8273700).

Almost surely, 2^64878937 is an apocalyptic number.

It is an amenable number.

64878937 is a deficient number, since it is larger than the sum of its proper divisors (1310663).

64878937 is a wasteful number, since it uses less digits than its factorization.

64878937 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3575.

The product of its digits is 2032128, while the sum is 52.

The square root of 64878937 is about 8054.7462405715. The cubic root of 64878937 is about 401.8227996362.

The spelling of 64878937 in words is "sixty-four million, eight hundred seventy-eight thousand, nine hundred thirty-seven".