1315629391 has 8 divisors (see below), whose sum is σ = 1322015744. Its totient is φ = 1309254840.

The previous prime is 1315629389. The next prime is 1315629481. The reversal of 1315629391 is 1939265131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1315629391 - 2¹ = 1315629389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1315629191) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 285790 + ... + 290356.

It is an arithmetic number, because the mean of its divisors is an integer number (165251968).

Almost surely, 2^1315629391 is an apocalyptic number.

1315629391 is a deficient number, since it is larger than the sum of its proper divisors (6386353).

1315629391 is a wasteful number, since it uses less digits than its factorization.

1315629391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5901.

The product of its digits is 43740, while the sum is 40.

The square root of 1315629391 is about 36271.6058508581. The cubic root of 1315629391 is about 1095.7492674950.

The spelling of 1315629391 in words is "one billion, three hundred fifteen million, six hundred twenty-nine thousand, three hundred ninety-one".