373901561 has 4 divisors (see below), whose sum is σ = 407892624. Its totient is φ = 339910500.

The previous prime is 373901543. The next prime is 373901569. The reversal of 373901561 is 165109373.

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.

It is a cyclic number.

It is not a de Polignac number, because 373901561 - 2²² = 369707257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (373901569) 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, 16995515 + ... + 16995536.

It is an arithmetic number, because the mean of its divisors is an integer number (101973156).

Almost surely, 2^373901561 is an apocalyptic number.

It is an amenable number.

373901561 is a deficient number, since it is larger than the sum of its proper divisors (33991063).

373901561 is a wasteful number, since it uses less digits than its factorization.

373901561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33991062.

The product of its (nonzero) digits is 17010, while the sum is 35.

The square root of 373901561 is about 19336.5343585659. The cubic root of 373901561 is about 720.4199973680.

The spelling of 373901561 in words is "three hundred seventy-three million, nine hundred one thousand, five hundred sixty-one".