1597421053 has 2 divisors, whose sum is σ = 1597421054. Its totient is φ = 1597421052.

The previous prime is 1597421003. The next prime is 1597421069. The reversal of 1597421053 is 3501247951.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 834169924 + 763251129 = 28882^2 + 27627^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1597421053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1597421003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 798710526 + 798710527.

It is an arithmetic number, because the mean of its divisors is an integer number (798710527).

Almost surely, 2^1597421053 is an apocalyptic number.

It is an amenable number.

1597421053 is a deficient number, since it is larger than the sum of its proper divisors (1).

1597421053 is an equidigital number, since it uses as much as digits as its factorization.

1597421053 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 37800, while the sum is 37.

The square root of 1597421053 is about 39967.7501618492. The cubic root of 1597421053 is about 1168.9783501203.

The spelling of 1597421053 in words is "one billion, five hundred ninety-seven million, four hundred twenty-one thousand, fifty-three".