897777938 has 6 divisors (see below), whose sum is σ = 1346730471. Its totient is φ = 448867782.

The previous prime is 897777917. The next prime is 897777961. The reversal of 897777938 is 839777798.

It can be written as a sum of positive squares in only one way, i.e., 448888969 + 448888969 = 21187^2 + 21187^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=21187.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 31781 + ... + 52967.

Almost surely, 2^897777938 is an apocalyptic number.

897777938 is a deficient number, since it is larger than the sum of its proper divisors (448952533).

897777938 is an frugal number, since it uses more digits than its factorization.

897777938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42376 (or 21189 counting only the distinct ones).

The product of its digits is 37340352, while the sum is 65.

The square root of 897777938 is about 29962.9427459988. The cubic root of 897777938 is about 964.6941456004.

The spelling of 897777938 in words is "eight hundred ninety-seven million, seven hundred seventy-seven thousand, nine hundred thirty-eight".