621433694 has 16 divisors (see below), whose sum is σ = 1072982400. Its totient is φ = 264411864.

The previous prime is 621433693. The next prime is 621433717. The reversal of 621433694 is 496334126.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621433693) 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, 157724 + ... + 161615.

It is an arithmetic number, because the mean of its divisors is an integer number (67061400).

Almost surely, 2^621433694 is an apocalyptic number.

621433694 is a deficient number, since it is larger than the sum of its proper divisors (451548706).

621433694 is a wasteful number, since it uses less digits than its factorization.

621433694 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319487.

The product of its digits is 93312, while the sum is 38.

The square root of 621433694 is about 24928.5718403602. The cubic root of 621433694 is about 853.3586577296.

The spelling of 621433694 in words is "six hundred twenty-one million, four hundred thirty-three thousand, six hundred ninety-four".