651893894 has 4 divisors (see below), whose sum is σ = 977840844. Its totient is φ = 325946946.

The previous prime is 651893843. The next prime is 651893909. The reversal of 651893894 is 498398156.

651893894 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 162973472 + ... + 162973475.

It is an arithmetic number, because the mean of its divisors is an integer number (244460211).

Almost surely, 2^651893894 is an apocalyptic number.

651893894 is a deficient number, since it is larger than the sum of its proper divisors (325946950).

651893894 is a wasteful number, since it uses less digits than its factorization.

651893894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325946949.

The product of its digits is 1866240, while the sum is 53.

The square root of 651893894 is about 25532.2128692364. The cubic root of 651893894 is about 867.0796049594.

The spelling of 651893894 in words is "six hundred fifty-one million, eight hundred ninety-three thousand, eight hundred ninety-four".