64994787 has 36 divisors (see below), whose sum is σ = 111153952. Its totient is φ = 36352800.

The previous prime is 64994777. The next prime is 64994821. The reversal of 64994787 is 78749946.

It is a happy number.

It is not a de Polignac number, because 64994787 - 2¹² = 64990691 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64994737) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 11862 + ... + 16452.

Almost surely, 2^64994787 is an apocalyptic number.

64994787 is a deficient number, since it is larger than the sum of its proper divisors (46159165).

64994787 is a wasteful number, since it uses less digits than its factorization.

64994787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4632 (or 4618 counting only the distinct ones).

The product of its digits is 3048192, while the sum is 54.

The square root of 64994787 is about 8061.9344452805. The cubic root of 64994787 is about 402.0618268313.

The spelling of 64994787 in words is "sixty-four million, nine hundred ninety-four thousand, seven hundred eighty-seven".