897985301690 has 16 divisors (see below), whose sum is σ = 1623080491560. Its totient is φ = 357703687680.

The previous prime is 897985301657. The next prime is 897985301701. The reversal of 897985301690 is 96103589798.

It can be written as a sum of positive squares in 4 ways, for example, as 542147998249 + 355837303441 = 736307^2 + 596521^2 .

It is a super-2 number, since 2×897985301690² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 186301595 + ... + 186306414.

Almost surely, 2^897985301690 is an apocalyptic number.

897985301690 is a deficient number, since it is larger than the sum of its proper divisors (725095189870).

897985301690 is a wasteful number, since it uses less digits than its factorization.

897985301690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372608257.

The product of its (nonzero) digits is 29393280, while the sum is 65.

The spelling of 897985301690 in words is "eight hundred ninety-seven billion, nine hundred eighty-five million, three hundred one thousand, six hundred ninety".