64783994 has 8 divisors (see below), whose sum is σ = 106010208. Its totient is φ = 29447260.

The previous prime is 64783981. The next prime is 64784011. The reversal of 64783994 is 49938746.

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

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1472342 + ... + 1472385.

It is an arithmetic number, because the mean of its divisors is an integer number (13251276).

Almost surely, 2^64783994 is an apocalyptic number.

64783994 is a deficient number, since it is larger than the sum of its proper divisors (41226214).

64783994 is a wasteful number, since it uses less digits than its factorization.

64783994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2944740.

The product of its digits is 1306368, while the sum is 50.

The square root of 64783994 is about 8048.8504769315. The cubic root of 64783994 is about 401.6266965118.

The spelling of 64783994 in words is "sixty-four million, seven hundred eighty-three thousand, nine hundred ninety-four".