897171892 has 6 divisors (see below), whose sum is σ = 1570050818. Its totient is φ = 448585944.

The previous prime is 897171883. The next prime is 897171907. The reversal of 897171892 is 298171798.

It can be written as a sum of positive squares in only one way, i.e., 581967376 + 315204516 = 24124^2 + 17754^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112146483 + ... + 112146490.

Almost surely, 2^897171892 is an apocalyptic number.

It is an amenable number.

897171892 is a deficient number, since it is larger than the sum of its proper divisors (672878926).

897171892 is a wasteful number, since it uses less digits than its factorization.

897171892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224292977 (or 224292975 counting only the distinct ones).

The product of its digits is 508032, while the sum is 52.

The square root of 897171892 is about 29952.8277796939. The cubic root of 897171892 is about 964.4770241168.

The spelling of 897171892 in words is "eight hundred ninety-seven million, one hundred seventy-one thousand, eight hundred ninety-two".