621061908 has 12 divisors (see below), whose sum is σ = 1449144480. Its totient is φ = 207020632.

The previous prime is 621061871. The next prime is 621061933. The reversal of 621061908 is 809160126.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25877568 + ... + 25877591.

It is an arithmetic number, because the mean of its divisors is an integer number (120762040).

Almost surely, 2^621061908 is an apocalyptic number.

It is an amenable number.

621061908 is an abundant number, since it is smaller than the sum of its proper divisors (828082572).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

621061908 is a wasteful number, since it uses less digits than its factorization.

621061908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51755166 (or 51755164 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 33.

The square root of 621061908 is about 24921.1136990304. The cubic root of 621061908 is about 853.1884437569.

The spelling of 621061908 in words is "six hundred twenty-one million, sixty-one thousand, nine hundred eight".