373313781 has 12 divisors (see below), whose sum is σ = 557825580. Its totient is φ = 240293760.

The previous prime is 373313779. The next prime is 373313791. The reversal of 373313781 is 187313373.

It can be written as a sum of positive squares in 2 ways, for example, as 72846225 + 300467556 = 8535^2 + 17334^2 .

It is not a de Polignac number, because 373313781 - 2¹ = 373313779 is a prime.

It is a super-2 number, since 2×373313781² = 278726358169031922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (373313711) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 714900 + ... + 715421.

It is an arithmetic number, because the mean of its divisors is an integer number (46485465).

Almost surely, 2^373313781 is an apocalyptic number.

It is an amenable number.

373313781 is a deficient number, since it is larger than the sum of its proper divisors (184511799).

373313781 is a wasteful number, since it uses less digits than its factorization.

373313781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1430356 (or 1430353 counting only the distinct ones).

The product of its digits is 31752, while the sum is 36.

The square root of 373313781 is about 19321.3296902672. The cubic root of 373313781 is about 720.0422949691.

The spelling of 373313781 in words is "three hundred seventy-three million, three hundred thirteen thousand, seven hundred eighty-one".