13147831 has 2 divisors, whose sum is σ = 13147832. Its totient is φ = 13147830.

The previous prime is 13147819. The next prime is 13147837. The reversal of 13147831 is 13874131.

It is a strong prime.

It is an emirp because it is prime and its reverse (13874131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13147831 - 2⁹ = 13147319 is a prime.

It is a super-2 number, since 2×13147831² = 345730920009122, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13147831.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13147837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6573915 + 6573916.

It is an arithmetic number, because the mean of its divisors is an integer number (6573916).

Almost surely, 2^13147831 is an apocalyptic number.

13147831 is a deficient number, since it is larger than the sum of its proper divisors (1).

13147831 is an equidigital number, since it uses as much as digits as its factorization.

13147831 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2016, while the sum is 28.

The square root of 13147831 is about 3625.9937948099. The cubic root of 13147831 is about 236.0213939717.

The spelling of 13147831 in words is "thirteen million, one hundred forty-seven thousand, eight hundred thirty-one".