1497097557 has 12 divisors (see below), whose sum is σ = 2167296300. Its totient is φ = 995839488.

The previous prime is 1497097549. The next prime is 1497097561. The reversal of 1497097557 is 7557907941.

It is a happy number.

1497097557 is a `hidden beast` number, since 14 + 9 + 70 + 9 + 7 + 557 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 735006321 + 762091236 = 27111^2 + 27606^2 .

It is not a de Polignac number, because 1497097557 - 2³ = 1497097549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1497097507) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 181198 + ... + 189279.

It is an arithmetic number, because the mean of its divisors is an integer number (180608025).

Almost surely, 2^1497097557 is an apocalyptic number.

It is an amenable number.

1497097557 is a deficient number, since it is larger than the sum of its proper divisors (670198743).

1497097557 is a wasteful number, since it uses less digits than its factorization.

1497097557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 370932 (or 370929 counting only the distinct ones).

The product of its (nonzero) digits is 2778300, while the sum is 54.

The square root of 1497097557 is about 38692.3449405693. The cubic root of 1497097557 is about 1143.9754396430.

The spelling of 1497097557 in words is "one billion, four hundred ninety-seven million, ninety-seven thousand, five hundred fifty-seven".