1597499555 has 4 divisors (see below), whose sum is σ = 1916999472. Its totient is φ = 1277999640.

The previous prime is 1597499521. The next prime is 1597499567. The reversal of 1597499555 is 5559947951.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1597499555 - 2²² = 1593305251 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1597499494 and 1597499503.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 159749951 + ... + 159749960.

It is an arithmetic number, because the mean of its divisors is an integer number (479249868).

Almost surely, 2^1597499555 is an apocalyptic number.

1597499555 is a deficient number, since it is larger than the sum of its proper divisors (319499917).

1597499555 is an equidigital number, since it uses as much as digits as its factorization.

1597499555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319499916.

The product of its digits is 12757500, while the sum is 59.

The square root of 1597499555 is about 39968.7322165715. The cubic root of 1597499555 is about 1168.9974988257.

The spelling of 1597499555 in words is "one billion, five hundred ninety-seven million, four hundred ninety-nine thousand, five hundred fifty-five".