1315802797 has 4 divisors (see below), whose sum is σ = 1315997280. Its totient is φ = 1315608316.

The previous prime is 1315802767. The next prime is 1315802809. The reversal of 1315802797 is 7972085131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1315802797 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 (1315802767) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86713 + ... + 100750.

It is an arithmetic number, because the mean of its divisors is an integer number (328999320).

Almost surely, 2^1315802797 is an apocalyptic number.

It is an amenable number.

1315802797 is a deficient number, since it is larger than the sum of its proper divisors (194483).

1315802797 is an equidigital number, since it uses as much as digits as its factorization.

1315802797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194482.

The product of its (nonzero) digits is 105840, while the sum is 43.

The square root of 1315802797 is about 36273.9961542701. The cubic root of 1315802797 is about 1095.7974069764.

The spelling of 1315802797 in words is "one billion, three hundred fifteen million, eight hundred two thousand, seven hundred ninety-seven".