371123981 has 2 divisors, whose sum is σ = 371123982. Its totient is φ = 371123980.

The previous prime is 371123969. The next prime is 371124071. The reversal of 371123981 is 189321173.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 369946756 + 1177225 = 19234^2 + 1085^2 .

It is a cyclic number.

It is not a de Polignac number, because 371123981 - 2¹⁸ = 370861837 is a prime.

It is a super-2 number, since 2×371123981² = 275466018546576722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (371123911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 185561990 + 185561991.

It is an arithmetic number, because the mean of its divisors is an integer number (185561991).

Almost surely, 2^371123981 is an apocalyptic number.

It is an amenable number.

371123981 is a deficient number, since it is larger than the sum of its proper divisors (1).

371123981 is an equidigital number, since it uses as much as digits as its factorization.

371123981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9072, while the sum is 35.

The square root of 371123981 is about 19264.5784018234. The cubic root of 371123981 is about 718.6316481524.

The spelling of 371123981 in words is "three hundred seventy-one million, one hundred twenty-three thousand, nine hundred eighty-one".