1597913 has 2 divisors, whose sum is σ = 1597914. Its totient is φ = 1597912.

The previous prime is 1597877. The next prime is 1597927. The reversal of 1597913 is 3197951.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1517824 + 80089 = 1232^2 + 283^2 .

It is a cyclic number.

It is not a de Polignac number, because 1597913 - 2⁸ = 1597657 is a prime.

It is not a weakly prime, because it can be changed into another prime (1597943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 798956 + 798957.

It is an arithmetic number, because the mean of its divisors is an integer number (798957).

2^1597913 is an apocalyptic number.

It is an amenable number.

1597913 is a deficient number, since it is larger than the sum of its proper divisors (1).

1597913 is an equidigital number, since it uses as much as digits as its factorization.

1597913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8505, while the sum is 35.

The square root of 1597913 is about 1264.0858356931. The cubic root of 1597913 is about 116.9098338600.

The spelling of 1597913 in words is "one million, five hundred ninety-seven thousand, nine hundred thirteen".