64713986 has 4 divisors (see below), whose sum is σ = 97070982. Its totient is φ = 32356992.

The previous prime is 64713983. The next prime is 64713991. The reversal of 64713986 is 68931746.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 53949025 + 10764961 = 7345^2 + 3281^2 .

It is not an unprimeable number, because it can be changed into a prime (64713983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16178495 + ... + 16178498.

Almost surely, 2^64713986 is an apocalyptic number.

64713986 is a deficient number, since it is larger than the sum of its proper divisors (32356996).

64713986 is a wasteful number, since it uses less digits than its factorization.

64713986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32356995.

The product of its digits is 217728, while the sum is 44.

The square root of 64713986 is about 8044.5003573870. The cubic root of 64713986 is about 401.4819734394.

The spelling of 64713986 in words is "sixty-four million, seven hundred thirteen thousand, nine hundred eighty-six".