1131625613 has 2 divisors, whose sum is σ = 1131625614. Its totient is φ = 1131625612.

The previous prime is 1131625603. The next prime is 1131625657. The reversal of 1131625613 is 3165261311.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 778298404 + 353327209 = 27898^2 + 18797^2 .

It is a cyclic number.

It is not a de Polignac number, because 1131625613 - 2²⁸ = 863190157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1131625603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 565812806 + 565812807.

It is an arithmetic number, because the mean of its divisors is an integer number (565812807).

Almost surely, 2^1131625613 is an apocalyptic number.

It is an amenable number.

1131625613 is a deficient number, since it is larger than the sum of its proper divisors (1).

1131625613 is an equidigital number, since it uses as much as digits as its factorization.

1131625613 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3240, while the sum is 29.

The square root of 1131625613 is about 33639.6434731404. The cubic root of 1131625613 is about 1042.0796689883.

Adding to 1131625613 its reverse (3165261311), we get a palindrome (4296886924).

The spelling of 1131625613 in words is "one billion, one hundred thirty-one million, six hundred twenty-five thousand, six hundred thirteen".