621105748 has 6 divisors (see below), whose sum is σ = 1086935066. Its totient is φ = 310552872.

The previous prime is 621105701. The next prime is 621105767. The reversal of 621105748 is 847501126.

It can be written as a sum of positive squares in only one way, i.e., 609694864 + 11410884 = 24692^2 + 3378^2 .

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 as a sum of consecutive naturals, namely, 77638215 + ... + 77638222.

Almost surely, 2^621105748 is an apocalyptic number.

It is an amenable number.

621105748 is a deficient number, since it is larger than the sum of its proper divisors (465829318).

621105748 is a wasteful number, since it uses less digits than its factorization.

621105748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155276441 (or 155276439 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 34.

The square root of 621105748 is about 24921.9932589671. The cubic root of 621105748 is about 853.2085184606.

The spelling of 621105748 in words is "six hundred twenty-one million, one hundred five thousand, seven hundred forty-eight".