1312550413 has 4 divisors (see below), whose sum is σ = 1312718848. Its totient is φ = 1312381980.

The previous prime is 1312550383. The next prime is 1312550431. The reversal of 1312550413 is 3140552131.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 3140552131 = 199 ⋅15781669.

It is a cyclic number.

It is not a de Polignac number, because 1312550413 - 2²⁵ = 1278995981 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 (1312550443) 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, 71931 + ... + 88312.

It is an arithmetic number, because the mean of its divisors is an integer number (328179712).

Almost surely, 2^1312550413 is an apocalyptic number.

It is an amenable number.

1312550413 is a deficient number, since it is larger than the sum of its proper divisors (168435).

1312550413 is an equidigital number, since it uses as much as digits as its factorization.

1312550413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168434.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 1312550413 is about 36229.1376242935. The cubic root of 1312550413 is about 1094.8938028686.

The spelling of 1312550413 in words is "one billion, three hundred twelve million, five hundred fifty thousand, four hundred thirteen".