1373612491 has 2 divisors, whose sum is σ = 1373612492. Its totient is φ = 1373612490.

The previous prime is 1373612489. The next prime is 1373612593. The reversal of 1373612491 is 1942163731.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1373612491 - 2¹ = 1373612489 is a prime.

It is a super-2 number, since 2×1373612491² = 3773622550862450162, which contains 22 as substring.

Together with 1373612489, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1373612491.

It is not a weakly prime, because it can be changed into another prime (1373613491) 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, 686806245 + 686806246.

It is an arithmetic number, because the mean of its divisors is an integer number (686806246).

Almost surely, 2^1373612491 is an apocalyptic number.

1373612491 is a deficient number, since it is larger than the sum of its proper divisors (1).

1373612491 is an equidigital number, since it uses as much as digits as its factorization.

1373612491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27216, while the sum is 37.

The square root of 1373612491 is about 37062.2785457128. The cubic root of 1373612491 is about 1111.6158839599.

The spelling of 1373612491 in words is "one billion, three hundred seventy-three million, six hundred twelve thousand, four hundred ninety-one".