621969089 has 16 divisors (see below), whose sum is σ = 776918016. Its totient is φ = 485568000.

The previous prime is 621969079. The next prime is 621969097. The reversal of 621969089 is 980969126.

It is a cyclic number.

It is not a de Polignac number, because 621969089 - 2¹⁶ = 621903553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (621969079) 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, 80612 + ... + 87989.

It is an arithmetic number, because the mean of its divisors is an integer number (48557376).

Almost surely, 2^621969089 is an apocalyptic number.

It is an amenable number.

621969089 is a deficient number, since it is larger than the sum of its proper divisors (154948927).

621969089 is a wasteful number, since it uses less digits than its factorization.

621969089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168656.

The product of its (nonzero) digits is 419904, while the sum is 50.

The square root of 621969089 is about 24939.3081098895. The cubic root of 621969089 is about 853.6036572185.

The spelling of 621969089 in words is "six hundred twenty-one million, nine hundred sixty-nine thousand, eighty-nine".