1376744491 has 2 divisors, whose sum is σ = 1376744492. Its totient is φ = 1376744490.

The previous prime is 1376744431. The next prime is 1376744513. The reversal of 1376744491 is 1944476731.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1376744491 - 2²³ = 1368355883 is a prime.

It is not a weakly prime, because it can be changed into another prime (1376744401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 688372245 + 688372246.

It is an arithmetic number, because the mean of its divisors is an integer number (688372246).

Almost surely, 2^1376744491 is an apocalyptic number.

1376744491 is a deficient number, since it is larger than the sum of its proper divisors (1).

1376744491 is an equidigital number, since it uses as much as digits as its factorization.

1376744491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 508032, while the sum is 46.

The square root of 1376744491 is about 37104.5076911148. The cubic root of 1376744491 is about 1112.4601148180.

The spelling of 1376744491 in words is "one billion, three hundred seventy-six million, seven hundred forty-four thousand, four hundred ninety-one".