1157136209 has 2 divisors, whose sum is σ = 1157136210. Its totient is φ = 1157136208.

The previous prime is 1157136181. The next prime is 1157136217. The reversal of 1157136209 is 9026317511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1151109184 + 6027025 = 33928^2 + 2455^2 .

It is a cyclic number.

It is not a de Polignac number, because 1157136209 - 2¹² = 1157132113 is a prime.

It is not a weakly prime, because it can be changed into another prime (1157136269) 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, 578568104 + 578568105.

It is an arithmetic number, because the mean of its divisors is an integer number (578568105).

Almost surely, 2^1157136209 is an apocalyptic number.

It is an amenable number.

1157136209 is a deficient number, since it is larger than the sum of its proper divisors (1).

1157136209 is an equidigital number, since it uses as much as digits as its factorization.

1157136209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11340, while the sum is 35.

The square root of 1157136209 is about 34016.7048521752. The cubic root of 1157136209 is about 1049.8521965801.

The spelling of 1157136209 in words is "one billion, one hundred fifty-seven million, one hundred thirty-six thousand, two hundred nine".