621370937 has 6 divisors (see below), whose sum is σ = 682994634. Its totient is φ = 564882560.

The previous prime is 621370909. The next prime is 621370943. The reversal of 621370937 is 739073126.

It can be written as a sum of positive squares in only one way, i.e., 539214841 + 82156096 = 23221^2 + 9064^2 .

It is not a de Polignac number, because 621370937 - 2¹⁰ = 621369913 is a prime.

It is a super-2 number, since 2×621370937² = 772203682696515938, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 621370937.

It is not an unprimeable number, because it can be changed into a prime (621370957) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2567528 + ... + 2567769.

It is an arithmetic number, because the mean of its divisors is an integer number (113832439).

Almost surely, 2^621370937 is an apocalyptic number.

It is an amenable number.

621370937 is a deficient number, since it is larger than the sum of its proper divisors (61623697).

621370937 is a wasteful number, since it uses less digits than its factorization.

621370937 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5135319 (or 5135308 counting only the distinct ones).

The product of its (nonzero) digits is 47628, while the sum is 38.

The square root of 621370937 is about 24927.3130722106. The cubic root of 621370937 is about 853.3299305928.

The spelling of 621370937 in words is "six hundred twenty-one million, three hundred seventy thousand, nine hundred thirty-seven".