897494591 has 4 divisors (see below), whose sum is σ = 1025708112. Its totient is φ = 769281072.

The previous prime is 897494567. The next prime is 897494603. The reversal of 897494591 is 195494798.

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

It is not a de Polignac number, because 897494591 - 2²⁶ = 830385727 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (897404591) 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, 64106750 + ... + 64106763.

It is an arithmetic number, because the mean of its divisors is an integer number (256427028).

Almost surely, 2^897494591 is an apocalyptic number.

897494591 is a deficient number, since it is larger than the sum of its proper divisors (128213521).

897494591 is a wasteful number, since it uses less digits than its factorization.

897494591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128213520.

The product of its digits is 3265920, while the sum is 56.

The square root of 897494591 is about 29958.2140822847. The cubic root of 897494591 is about 964.5926461308.

The spelling of 897494591 in words is "eight hundred ninety-seven million, four hundred ninety-four thousand, five hundred ninety-one".