373616621 has 6 divisors (see below), whose sum is σ = 434615310. Its totient is φ = 320242776.

The previous prime is 373616603. The next prime is 373616629. The reversal of 373616621 is 126616373.

It can be written as a sum of positive squares in only one way, i.e., 259660996 + 113955625 = 16114^2 + 10675^2 .

It is not a de Polignac number, because 373616621 - 2¹⁸ = 373354477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (373616629) 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, 3812366 + ... + 3812463.

It is an arithmetic number, because the mean of its divisors is an integer number (72435885).

Almost surely, 2^373616621 is an apocalyptic number.

It is an amenable number.

373616621 is a deficient number, since it is larger than the sum of its proper divisors (60998689).

373616621 is an equidigital number, since it uses as much as digits as its factorization.

373616621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7624843 (or 7624836 counting only the distinct ones).

The product of its digits is 27216, while the sum is 35.

The square root of 373616621 is about 19329.1650362865. The cubic root of 373616621 is about 720.2369468339.

The spelling of 373616621 in words is "three hundred seventy-three million, six hundred sixteen thousand, six hundred twenty-one".