897869421 has 16 divisors (see below), whose sum is σ = 1342612800. Its totient is φ = 592983504.

The previous prime is 897869407. The next prime is 897869443. The reversal of 897869421 is 124968798.

897869421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 897869421 - 2²⁵ = 864314989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (897869821) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 152506 + ... + 158283.

It is an arithmetic number, because the mean of its divisors is an integer number (83913300).

Almost surely, 2^897869421 is an apocalyptic number.

It is an amenable number.

897869421 is a deficient number, since it is larger than the sum of its proper divisors (444743379).

897869421 is a wasteful number, since it uses less digits than its factorization.

897869421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310905 (or 310899 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 54.

The square root of 897869421 is about 29964.4693095005. The cubic root of 897869421 is about 964.7269117272.

The spelling of 897869421 in words is "eight hundred ninety-seven million, eight hundred sixty-nine thousand, four hundred twenty-one".