1155499997 has 2 divisors, whose sum is σ = 1155499998. Its totient is φ = 1155499996.

The previous prime is 1155499931. The next prime is 1155500033. The reversal of 1155499997 is 7999945511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 894548281 + 260951716 = 29909^2 + 16154^2 .

It is an emirp because it is prime and its reverse (7999945511) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1155499997 - 2¹⁰ = 1155498973 is a prime.

It is a super-3 number, since 3×1155499997³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1155499907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 577749998 + 577749999.

It is an arithmetic number, because the mean of its divisors is an integer number (577749999).

Almost surely, 2^1155499997 is an apocalyptic number.

It is an amenable number.

1155499997 is a deficient number, since it is larger than the sum of its proper divisors (1).

1155499997 is an equidigital number, since it uses as much as digits as its factorization.

1155499997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4592700, while the sum is 59.

The square root of 1155499997 is about 33992.6462194399. The cubic root of 1155499997 is about 1049.3571263532.

The spelling of 1155499997 in words is "one billion, one hundred fifty-five million, four hundred ninety-nine thousand, nine hundred ninety-seven".