64783887 has 8 divisors (see below), whose sum is σ = 98718336. Its totient is φ = 37019352.

The previous prime is 64783811. The next prime is 64783897. The reversal of 64783887 is 78838746.

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

It is not a de Polignac number, because 64783887 - 2¹⁵ = 64751119 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64783897) 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, 1542453 + ... + 1542494.

It is an arithmetic number, because the mean of its divisors is an integer number (12339792).

Almost surely, 2^64783887 is an apocalyptic number.

64783887 is a deficient number, since it is larger than the sum of its proper divisors (33934449).

64783887 is a wasteful number, since it uses less digits than its factorization.

64783887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3084957.

The product of its digits is 1806336, while the sum is 51.

The square root of 64783887 is about 8048.8438300168. The cubic root of 64783887 is about 401.6264753971.

The spelling of 64783887 in words is "sixty-four million, seven hundred eighty-three thousand, eight hundred eighty-seven".