1157171149 has 2 divisors, whose sum is σ = 1157171150. Its totient is φ = 1157171148.

The previous prime is 1157171111. The next prime is 1157171153. The reversal of 1157171149 is 9411717511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 741745225 + 415425924 = 27235^2 + 20382^2 .

It is a cyclic number.

It is not a de Polignac number, because 1157171149 - 2¹³ = 1157162957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1157171179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 578585574 + 578585575.

It is an arithmetic number, because the mean of its divisors is an integer number (578585575).

Almost surely, 2^1157171149 is an apocalyptic number.

It is an amenable number.

1157171149 is a deficient number, since it is larger than the sum of its proper divisors (1).

1157171149 is an equidigital number, since it uses as much as digits as its factorization.

1157171149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8820, while the sum is 37.

The square root of 1157171149 is about 34017.2184195004. The cubic root of 1157171149 is about 1049.8627633185.

The spelling of 1157171149 in words is "one billion, one hundred fifty-seven million, one hundred seventy-one thousand, one hundred forty-nine".