1131926557 has 2 divisors, whose sum is σ = 1131926558. Its totient is φ = 1131926556.

The previous prime is 1131926519. The next prime is 1131926561. The reversal of 1131926557 is 7556291311.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 796707076 + 335219481 = 28226^2 + 18309^2 .

It is an emirp because it is prime and its reverse (7556291311) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1131926557 - 2¹¹ = 1131924509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1131926507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 565963278 + 565963279.

It is an arithmetic number, because the mean of its divisors is an integer number (565963279).

Almost surely, 2^1131926557 is an apocalyptic number.

It is an amenable number.

1131926557 is a deficient number, since it is larger than the sum of its proper divisors (1).

1131926557 is an equidigital number, since it uses as much as digits as its factorization.

1131926557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 56700, while the sum is 40.

The square root of 1131926557 is about 33644.1162315196. The cubic root of 1131926557 is about 1042.1720375315.

The spelling of 1131926557 in words is "one billion, one hundred thirty-one million, nine hundred twenty-six thousand, five hundred fifty-seven".