1597878481 has 2 divisors, whose sum is σ = 1597878482. Its totient is φ = 1597878480.

The previous prime is 1597878463. The next prime is 1597878497. The reversal of 1597878481 is 1848787951.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 972878481 + 625000000 = 31191^2 + 25000^2 .

It is a cyclic number.

It is not a de Polignac number, because 1597878481 - 2¹⁵ = 1597845713 is a prime.

It is a super-2 number, since 2×1597878481² = 5106431280085734722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1597878181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 798939240 + 798939241.

It is an arithmetic number, because the mean of its divisors is an integer number (798939241).

Almost surely, 2^1597878481 is an apocalyptic number.

It is an amenable number.

1597878481 is a deficient number, since it is larger than the sum of its proper divisors (1).

1597878481 is an equidigital number, since it uses as much as digits as its factorization.

1597878481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4515840, while the sum is 58.

The square root of 1597878481 is about 39973.4722159584. The cubic root of 1597878481 is about 1169.0899200360.

The spelling of 1597878481 in words is "one billion, five hundred ninety-seven million, eight hundred seventy-eight thousand, four hundred eighty-one".