373681813 has 4 divisors (see below), whose sum is σ = 373740588. Its totient is φ = 373623040.

The previous prime is 373681801. The next prime is 373681859. The reversal of 373681813 is 318186373.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 90668484 + 283013329 = 9522^2 + 16823^2 .

It is a cyclic number.

It is not a de Polignac number, because 373681813 - 2¹³ = 373673621 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 (373687813) 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, 18508 + ... + 33013.

It is an arithmetic number, because the mean of its divisors is an integer number (93435147).

Almost surely, 2^373681813 is an apocalyptic number.

It is an amenable number.

373681813 is a deficient number, since it is larger than the sum of its proper divisors (58775).

373681813 is an equidigital number, since it uses as much as digits as its factorization.

373681813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58774.

The product of its digits is 72576, while the sum is 40.

The square root of 373681813 is about 19330.8513263126. The cubic root of 373681813 is about 720.2788355452.

The spelling of 373681813 in words is "three hundred seventy-three million, six hundred eighty-one thousand, eight hundred thirteen".