621468129 has 12 divisors (see below), whose sum is σ = 856220208. Its totient is φ = 400945320.

The previous prime is 621468109. The next prime is 621468161. The reversal of 621468129 is 921864126.

It is not a de Polignac number, because 621468129 - 2⁵ = 621468097 is a prime.

It is not an unprimeable number, because it can be changed into a prime (621468109) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 104899 + ... + 110664.

It is an arithmetic number, because the mean of its divisors is an integer number (71351684).

Almost surely, 2^621468129 is an apocalyptic number.

It is an amenable number.

621468129 is a deficient number, since it is larger than the sum of its proper divisors (234752079).

621468129 is a wasteful number, since it uses less digits than its factorization.

621468129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215628 (or 215597 counting only the distinct ones).

The product of its digits is 41472, while the sum is 39.

The square root of 621468129 is about 24929.2625041336. The cubic root of 621468129 is about 853.3744195950.

The spelling of 621468129 in words is "six hundred twenty-one million, four hundred sixty-eight thousand, one hundred twenty-nine".