1897597253 has 2 divisors, whose sum is σ = 1897597254. Its totient is φ = 1897597252.

The previous prime is 1897597231. The next prime is 1897597277. The reversal of 1897597253 is 3527957981.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1705442209 + 192155044 = 41297^2 + 13862^2 .

It is a cyclic number.

It is not a de Polignac number, because 1897597253 - 2⁶ = 1897597189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1897597553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 948798626 + 948798627.

It is an arithmetic number, because the mean of its divisors is an integer number (948798627).

Almost surely, 2^1897597253 is an apocalyptic number.

It is an amenable number.

1897597253 is a deficient number, since it is larger than the sum of its proper divisors (1).

1897597253 is an equidigital number, since it uses as much as digits as its factorization.

1897597253 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4762800, while the sum is 56.

The square root of 1897597253 is about 43561.4193180158. The cubic root of 1897597253 is about 1238.0400125652.

The spelling of 1897597253 in words is "one billion, eight hundred ninety-seven million, five hundred ninety-seven thousand, two hundred fifty-three".