1157170849 has 2 divisors, whose sum is σ = 1157170850. Its totient is φ = 1157170848.

The previous prime is 1157170799. The next prime is 1157170897. The reversal of 1157170849 is 9480717511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1058526225 + 98644624 = 32535^2 + 9932^2 .

It is a cyclic number.

It is not a de Polignac number, because 1157170849 - 2¹⁷ = 1157039777 is a prime.

It is not a weakly prime, because it can be changed into another prime (1157170349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 578585424 + 578585425.

It is an arithmetic number, because the mean of its divisors is an integer number (578585425).

Almost surely, 2^1157170849 is an apocalyptic number.

It is an amenable number.

1157170849 is a deficient number, since it is larger than the sum of its proper divisors (1).

1157170849 is an equidigital number, since it uses as much as digits as its factorization.

1157170849 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 70560, while the sum is 43.

The square root of 1157170849 is about 34017.2140099685. The cubic root of 1157170849 is about 1049.8626725918.

The spelling of 1157170849 in words is "one billion, one hundred fifty-seven million, one hundred seventy thousand, eight hundred forty-nine".