1597969 has 2 divisors, whose sum is σ = 1597970. Its totient is φ = 1597968.

The previous prime is 1597961. The next prime is 1597979. The reversal of 1597969 is 9697951.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1500625 + 97344 = 1225^2 + 312^2 .

It is a cyclic number.

It is not a de Polignac number, because 1597969 - 2³ = 1597961 is a prime.

It is a super-2 number, since 2×1597969² = 5107009849922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1597961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 798984 + 798985.

It is an arithmetic number, because the mean of its divisors is an integer number (798985).

2^1597969 is an apocalyptic number.

It is an amenable number.

1597969 is a deficient number, since it is larger than the sum of its proper divisors (1).

1597969 is an equidigital number, since it uses as much as digits as its factorization.

1597969 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 153090, while the sum is 46.

The square root of 1597969 is about 1264.1079858936. The cubic root of 1597969 is about 116.9111995735.

It can be divided in two parts, 159 and 7969, that added together give a triangular number (8128 = T₁₂₇).

The spelling of 1597969 in words is "one million, five hundred ninety-seven thousand, nine hundred sixty-nine".