1376374981 has 2 divisors, whose sum is σ = 1376374982. Its totient is φ = 1376374980.

The previous prime is 1376374957. The next prime is 1376375017. The reversal of 1376374981 is 1894736731.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 752624356 + 623750625 = 27434^2 + 24975^2 .

It is a cyclic number.

It is not a de Polignac number, because 1376374981 - 2²⁷ = 1242157253 is a prime.

It is a super-2 number, since 2×1376374981² = 3788816176645500722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1376374081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 688187490 + 688187491.

It is an arithmetic number, because the mean of its divisors is an integer number (688187491).

Almost surely, 2^1376374981 is an apocalyptic number.

It is an amenable number.

1376374981 is a deficient number, since it is larger than the sum of its proper divisors (1).

1376374981 is an equidigital number, since it uses as much as digits as its factorization.

1376374981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 762048, while the sum is 49.

The square root of 1376374981 is about 37099.5280428202. The cubic root of 1376374981 is about 1112.3605800288.

The spelling of 1376374981 in words is "one billion, three hundred seventy-six million, three hundred seventy-four thousand, nine hundred eighty-one".