374215981 has 2 divisors, whose sum is σ = 374215982. Its totient is φ = 374215980.

The previous prime is 374215967. The next prime is 374215991. The reversal of 374215981 is 189512473.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 356076900 + 18139081 = 18870^2 + 4259^2 .

It is a cyclic number.

It is not a de Polignac number, because 374215981 - 2⁵ = 374215949 is a prime.

It is a super-2 number, since 2×374215981² = 280075200871584722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (374215931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 187107990 + 187107991.

It is an arithmetic number, because the mean of its divisors is an integer number (187107991).

Almost surely, 2^374215981 is an apocalyptic number.

It is an amenable number.

374215981 is a deficient number, since it is larger than the sum of its proper divisors (1).

374215981 is an equidigital number, since it uses as much as digits as its factorization.

374215981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60480, while the sum is 40.

The square root of 374215981 is about 19344.6628556819. The cubic root of 374215981 is about 720.6218784829.

The spelling of 374215981 in words is "three hundred seventy-four million, two hundred fifteen thousand, nine hundred eighty-one".