374143981 has 2 divisors, whose sum is σ = 374143982. Its totient is φ = 374143980.

The previous prime is 374143951. The next prime is 374143999. The reversal of 374143981 is 189341473.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 203319081 + 170824900 = 14259^2 + 13070^2 .

It is an emirp because it is prime and its reverse (189341473) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 374143981 - 2⁵ = 374143949 is a prime.

It is a super-2 number, since 2×374143981² = 279967437037056722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (374143951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 187071990 + 187071991.

It is an arithmetic number, because the mean of its divisors is an integer number (187071991).

Almost surely, 2^374143981 is an apocalyptic number.

It is an amenable number.

374143981 is a deficient number, since it is larger than the sum of its proper divisors (1).

374143981 is an equidigital number, since it uses as much as digits as its factorization.

374143981 is an odious number, because the sum of its binary digits is odd.

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

The square root of 374143981 is about 19342.8017877452. The cubic root of 374143981 is about 720.5756590928.

The spelling of 374143981 in words is "three hundred seventy-four million, one hundred forty-three thousand, nine hundred eighty-one".