1313898247 has 4 divisors (see below), whose sum is σ = 1315598760. Its totient is φ = 1312197736.

The previous prime is 1313898233. The next prime is 1313898269. The reversal of 1313898247 is 7428983131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7428983131 = 20533 ⋅361807.

It is a cyclic number.

It is not a de Polignac number, because 1313898247 - 2¹⁵ = 1313865479 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1313898197 and 1313898206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1313898277) 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, 849097 + ... + 850642.

It is an arithmetic number, because the mean of its divisors is an integer number (328899690).

Almost surely, 2^1313898247 is an apocalyptic number.

1313898247 is a deficient number, since it is larger than the sum of its proper divisors (1700513).

1313898247 is an equidigital number, since it uses as much as digits as its factorization.

1313898247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1700512.

The product of its digits is 290304, while the sum is 46.

The square root of 1313898247 is about 36247.7343705783. The cubic root of 1313898247 is about 1095.2684501284.

The spelling of 1313898247 in words is "one billion, three hundred thirteen million, eight hundred ninety-eight thousand, two hundred forty-seven".