621969477 has 8 divisors (see below), whose sum is σ = 830128416. Its totient is φ = 414228432.

The previous prime is 621969457. The next prime is 621969479. The reversal of 621969477 is 774969126.

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

It is not a de Polignac number, because 621969477 - 2¹⁶ = 621903941 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621969479) 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, 100983 + ... + 106964.

It is an arithmetic number, because the mean of its divisors is an integer number (103766052).

Almost surely, 2^621969477 is an apocalyptic number.

It is an amenable number.

621969477 is a deficient number, since it is larger than the sum of its proper divisors (208158939).

621969477 is a wasteful number, since it uses less digits than its factorization.

621969477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208947.

The product of its digits is 1143072, while the sum is 51.

The square root of 621969477 is about 24939.3158887729. The cubic root of 621969477 is about 853.6038347183.

The spelling of 621969477 in words is "six hundred twenty-one million, nine hundred sixty-nine thousand, four hundred seventy-seven".