1171431089 has 2 divisors, whose sum is σ = 1171431090. Its totient is φ = 1171431088.

The previous prime is 1171431071. The next prime is 1171431103. The reversal of 1171431089 is 9801341711.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 824838400 + 346592689 = 28720^2 + 18617^2 .

It is a cyclic number.

It is not a de Polignac number, because 1171431089 - 2²⁰ = 1170382513 is a prime.

It is not a weakly prime, because it can be changed into another prime (1171431029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 585715544 + 585715545.

It is an arithmetic number, because the mean of its divisors is an integer number (585715545).

Almost surely, 2^1171431089 is an apocalyptic number.

It is an amenable number.

1171431089 is a deficient number, since it is larger than the sum of its proper divisors (1).

1171431089 is an equidigital number, since it uses as much as digits as its factorization.

1171431089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 35.

The square root of 1171431089 is about 34226.1754947876. The cubic root of 1171431089 is about 1054.1576916010.

The spelling of 1171431089 in words is "one billion, one hundred seventy-one million, four hundred thirty-one thousand, eighty-nine".