621574989 has 16 divisors (see below), whose sum is σ = 950771712. Its totient is φ = 353832048.

The previous prime is 621574979. The next prime is 621575011. The reversal of 621574989 is 989475126.

621574989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 621574989 - 2⁴ = 621574973 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621574939) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50749 + ... + 61794.

It is an arithmetic number, because the mean of its divisors is an integer number (59423232).

Almost surely, 2^621574989 is an apocalyptic number.

It is an amenable number.

621574989 is a deficient number, since it is larger than the sum of its proper divisors (329196723).

621574989 is a wasteful number, since it uses less digits than its factorization.

621574989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112816.

The product of its digits is 1088640, while the sum is 51.

The square root of 621574989 is about 24931.4056763753. The cubic root of 621574989 is about 853.4233287076.

The spelling of 621574989 in words is "six hundred twenty-one million, five hundred seventy-four thousand, nine hundred eighty-nine".