64936787 has 4 divisors (see below), whose sum is σ = 68756616. Its totient is φ = 61116960.

The previous prime is 64936777. The next prime is 64936799. The reversal of 64936787 is 78763946.

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 64936787 - 2¹² = 64932691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64936777) 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, 1909889 + ... + 1909922.

It is an arithmetic number, because the mean of its divisors is an integer number (17189154).

Almost surely, 2^64936787 is an apocalyptic number.

64936787 is a deficient number, since it is larger than the sum of its proper divisors (3819829).

64936787 is a wasteful number, since it uses less digits than its factorization.

64936787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3819828.

The product of its digits is 1524096, while the sum is 50.

The square root of 64936787 is about 8058.3364908646. The cubic root of 64936787 is about 401.9421940264.

The spelling of 64936787 in words is "sixty-four million, nine hundred thirty-six thousand, seven hundred eighty-seven".