897031687 has 4 divisors (see below), whose sum is σ = 897131800. Its totient is φ = 896931576.

The previous prime is 897031651. The next prime is 897031697. The reversal of 897031687 is 786130798.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 897031687 - 2¹⁹ = 896507399 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 897031687.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (897031627) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35133 + ... + 55030.

It is an arithmetic number, because the mean of its divisors is an integer number (224282950).

Almost surely, 2^897031687 is an apocalyptic number.

897031687 is a deficient number, since it is larger than the sum of its proper divisors (100113).

897031687 is an equidigital number, since it uses as much as digits as its factorization.

897031687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100112.

The product of its (nonzero) digits is 508032, while the sum is 49.

The square root of 897031687 is about 29950.4872581399. The cubic root of 897031687 is about 964.4267804764.

The spelling of 897031687 in words is "eight hundred ninety-seven million, thirty-one thousand, six hundred eighty-seven".