1597428447 has 4 divisors (see below), whose sum is σ = 2129904600. Its totient is φ = 1064952296.

The previous prime is 1597428421. The next prime is 1597428451. The reversal of 1597428447 is 7448247951.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7448247951 = 3 ⋅2482749317.

It is a cyclic number.

It is not a de Polignac number, because 1597428447 - 2²⁰ = 1596379871 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1597428447.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1597428467) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 266238072 + ... + 266238077.

It is an arithmetic number, because the mean of its divisors is an integer number (532476150).

Almost surely, 2^1597428447 is an apocalyptic number.

1597428447 is a deficient number, since it is larger than the sum of its proper divisors (532476153).

1597428447 is an equidigital number, since it uses as much as digits as its factorization.

1597428447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 532476152.

The product of its digits is 2257920, while the sum is 51.

The square root of 1597428447 is about 39967.8426613196. The cubic root of 1597428447 is about 1168.9801537384.

The spelling of 1597428447 in words is "one billion, five hundred ninety-seven million, four hundred twenty-eight thousand, four hundred forty-seven".