1374909491 has 2 divisors, whose sum is σ = 1374909492. Its totient is φ = 1374909490.

The previous prime is 1374909463. The next prime is 1374909593. The reversal of 1374909491 is 1949094731.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1374909491 is a prime.

It is a super-2 number, since 2×1374909491² = 3780752216883758162, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1374909191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 687454745 + 687454746.

It is an arithmetic number, because the mean of its divisors is an integer number (687454746).

Almost surely, 2^1374909491 is an apocalyptic number.

1374909491 is a deficient number, since it is larger than the sum of its proper divisors (1).

1374909491 is an equidigital number, since it uses as much as digits as its factorization.

1374909491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 244944, while the sum is 47.

The square root of 1374909491 is about 37079.7719922871. The cubic root of 1374909491 is about 1111.9656459355.

The spelling of 1374909491 in words is "one billion, three hundred seventy-four million, nine hundred nine thousand, four hundred ninety-one".