1313151493 has 2 divisors, whose sum is σ = 1313151494. Its totient is φ = 1313151492.

The previous prime is 1313151491. The next prime is 1313151527. The reversal of 1313151493 is 3941513131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1100049889 + 213101604 = 33167^2 + 14598^2 .

It is a cyclic number.

It is not a de Polignac number, because 1313151493 - 2¹ = 1313151491 is a prime.

It is a super-3 number, since 3×1313151493³ (a number of 28 digits) contains 333 as substring.

Together with 1313151491, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1313151491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656575746 + 656575747.

It is an arithmetic number, because the mean of its divisors is an integer number (656575747).

Almost surely, 2^1313151493 is an apocalyptic number.

It is an amenable number.

1313151493 is a deficient number, since it is larger than the sum of its proper divisors (1).

1313151493 is an equidigital number, since it uses as much as digits as its factorization.

1313151493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4860, while the sum is 31.

The square root of 1313151493 is about 36237.4322075944. The cubic root of 1313151493 is about 1095.0609122166.

The spelling of 1313151493 in words is "one billion, three hundred thirteen million, one hundred fifty-one thousand, four hundred ninety-three".