373981 has 2 divisors, whose sum is σ = 373982. Its totient is φ = 373980.

The previous prime is 373969. The next prime is 373987. The reversal of 373981 is 189373.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 319225 + 54756 = 565^2 + 234^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-373981 is a prime.

It is a super-2 number, since 2×373981² = 279723576722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (373987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 186990 + 186991.

It is an arithmetic number, because the mean of its divisors is an integer number (186991).

2³⁷³⁹⁸¹ is an apocalyptic number.

It is an amenable number.

373981 is a deficient number, since it is larger than the sum of its proper divisors (1).

373981 is an equidigital number, since it uses as much as digits as its factorization.

373981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4536, while the sum is 31.

The square root of 373981 is about 611.5398596985. The cubic root of 373981 is about 72.0471013819.

It can be divided in two parts, 3 and 73981, that added together give a square (73984 = 272²).

The spelling of 373981 in words is "three hundred seventy-three thousand, nine hundred eighty-one".