1157508497 has 2 divisors, whose sum is σ = 1157508498. Its totient is φ = 1157508496.

The previous prime is 1157508463. The next prime is 1157508503. The reversal of 1157508497 is 7948057511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 994077841 + 163430656 = 31529^2 + 12784^2 .

It is an emirp because it is prime and its reverse (7948057511) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1157508497 - 2⁸ = 1157508241 is a prime.

It is not a weakly prime, because it can be changed into another prime (1157502497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 578754248 + 578754249.

It is an arithmetic number, because the mean of its divisors is an integer number (578754249).

Almost surely, 2^1157508497 is an apocalyptic number.

It is an amenable number.

1157508497 is a deficient number, since it is larger than the sum of its proper divisors (1).

1157508497 is an equidigital number, since it uses as much as digits as its factorization.

1157508497 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 352800, while the sum is 47.

The square root of 1157508497 is about 34022.1765470700. The cubic root of 1157508497 is about 1049.9647749332.

The spelling of 1157508497 in words is "one billion, one hundred fifty-seven million, five hundred eight thousand, four hundred ninety-seven".