1165431049 has 2 divisors, whose sum is σ = 1165431050. Its totient is φ = 1165431048.

The previous prime is 1165431017. The next prime is 1165431061. The reversal of 1165431049 is 9401345611.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1008380025 + 157051024 = 31755^2 + 12532^2 .

It is a cyclic number.

It is not a de Polignac number, because 1165431049 - 2⁵ = 1165431017 is a prime.

It is not a weakly prime, because it can be changed into another prime (1165431649) 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, 582715524 + 582715525.

It is an arithmetic number, because the mean of its divisors is an integer number (582715525).

Almost surely, 2^1165431049 is an apocalyptic number.

It is an amenable number.

1165431049 is a deficient number, since it is larger than the sum of its proper divisors (1).

1165431049 is an equidigital number, since it uses as much as digits as its factorization.

1165431049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 1165431049 is about 34138.4101709497. The cubic root of 1165431049 is about 1052.3548204466.

The spelling of 1165431049 in words is "one billion, one hundred sixty-five million, four hundred thirty-one thousand, forty-nine".