373725661 has 4 divisors (see below), whose sum is σ = 373765024. Its totient is φ = 373686300.

The previous prime is 373725659. The next prime is 373725673. The reversal of 373725661 is 166527373.

373725661 = T₁₅₇₈₃ + T₁₅₇₈₄ + T₁₅₇₈₅.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 373725661 - 2¹ = 373725659 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 (373725761) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4306 + ... + 27676.

It is an arithmetic number, because the mean of its divisors is an integer number (93441256).

Almost surely, 2^373725661 is an apocalyptic number.

373725661 is the 15785-th centered triangular number.

It is an amenable number.

373725661 is a deficient number, since it is larger than the sum of its proper divisors (39363).

373725661 is a wasteful number, since it uses less digits than its factorization.

373725661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39362.

The product of its digits is 158760, while the sum is 40.

The square root of 373725661 is about 19331.9854386455. The cubic root of 373725661 is about 720.3070070627.

The spelling of 373725661 in words is "three hundred seventy-three million, seven hundred twenty-five thousand, six hundred sixty-one".