1313454581 has 2 divisors, whose sum is σ = 1313454582. Its totient is φ = 1313454580.

The previous prime is 1313454563. The next prime is 1313454589. The reversal of 1313454581 is 1854543131.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 736253956 + 577200625 = 27134^2 + 24025^2 .

It is a cyclic number.

It is not a de Polignac number, because 1313454581 - 2⁶ = 1313454517 is a prime.

It is a super-2 number, since 2×1313454581² = 3450325872699771122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1313454589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656727290 + 656727291.

It is an arithmetic number, because the mean of its divisors is an integer number (656727291).

Almost surely, 2^1313454581 is an apocalyptic number.

It is an amenable number.

1313454581 is a deficient number, since it is larger than the sum of its proper divisors (1).

1313454581 is an equidigital number, since it uses as much as digits as its factorization.

1313454581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28800, while the sum is 35.

The square root of 1313454581 is about 36241.6139403311. The cubic root of 1313454581 is about 1095.1451559340.

The spelling of 1313454581 in words is "one billion, three hundred thirteen million, four hundred fifty-four thousand, five hundred eighty-one".