621122887 has 12 divisors (see below), whose sum is σ = 780254608. Its totient is φ = 483991200.

The previous prime is 621122881. The next prime is 621122891. The reversal of 621122887 is 788221126.

It is a de Polignac number, because none of the positive numbers 2^k-621122887 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621122881) 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 11 ways as a sum of consecutive naturals, for example, 365814 + ... + 367507.

Almost surely, 2^621122887 is an apocalyptic number.

621122887 is a deficient number, since it is larger than the sum of its proper divisors (159131721).

621122887 is a wasteful number, since it uses less digits than its factorization.

621122887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 733350 (or 733339 counting only the distinct ones).

The product of its digits is 21504, while the sum is 37.

The square root of 621122887 is about 24922.3371095088. The cubic root of 621122887 is about 853.2163662956.

The spelling of 621122887 in words is "six hundred twenty-one million, one hundred twenty-two thousand, eight hundred eighty-seven".