1158598949 has 2 divisors, whose sum is σ = 1158598950. Its totient is φ = 1158598948.

The previous prime is 1158598937. The next prime is 1158598957. The reversal of 1158598949 is 9498958511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1133668900 + 24930049 = 33670^2 + 4993^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1158598949 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1158598979) 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, 579299474 + 579299475.

It is an arithmetic number, because the mean of its divisors is an integer number (579299475).

Almost surely, 2^1158598949 is an apocalyptic number.

It is an amenable number.

1158598949 is a deficient number, since it is larger than the sum of its proper divisors (1).

1158598949 is an equidigital number, since it uses as much as digits as its factorization.

1158598949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4665600, while the sum is 59.

The square root of 1158598949 is about 34038.1983806429. The cubic root of 1158598949 is about 1050.2943842748.

The spelling of 1158598949 in words is "one billion, one hundred fifty-eight million, five hundred ninety-eight thousand, nine hundred forty-nine".