621924977 has 8 divisors (see below), whose sum is σ = 625495200. Its totient is φ = 618365664.

The previous prime is 621924943. The next prime is 621925001. The reversal of 621924977 is 779429126.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-621924977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (621924917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 129149 + ... + 133877.

It is an arithmetic number, because the mean of its divisors is an integer number (78186900).

Almost surely, 2^621924977 is an apocalyptic number.

It is an amenable number.

621924977 is a deficient number, since it is larger than the sum of its proper divisors (3570223).

621924977 is a wasteful number, since it uses less digits than its factorization.

621924977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5455.

The product of its digits is 381024, while the sum is 47.

The square root of 621924977 is about 24938.4237072033. The cubic root of 621924977 is about 853.5834766578.

The spelling of 621924977 in words is "six hundred twenty-one million, nine hundred twenty-four thousand, nine hundred seventy-seven".