897644159 has 2 divisors, whose sum is σ = 897644160. Its totient is φ = 897644158.

The previous prime is 897644129. The next prime is 897644173. The reversal of 897644159 is 951446798.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 897644159 - 2²⁸ = 629208703 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 897644159.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (897644129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 448822079 + 448822080.

It is an arithmetic number, because the mean of its divisors is an integer number (448822080).

Almost surely, 2^897644159 is an apocalyptic number.

897644159 is a deficient number, since it is larger than the sum of its proper divisors (1).

897644159 is an equidigital number, since it uses as much as digits as its factorization.

897644159 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2177280, while the sum is 53.

The square root of 897644159 is about 29960.7102552660. The cubic root of 897644159 is about 964.6462264646.

It can be divided in two parts, 8976 and 44159, that added together give a palindrome (53135).

The spelling of 897644159 in words is "eight hundred ninety-seven million, six hundred forty-four thousand, one hundred fifty-nine".