897409973 has 4 divisors (see below), whose sum is σ = 897529260. Its totient is φ = 897290688.

The previous prime is 897409937. The next prime is 897409987. The reversal of 897409973 is 379904798.

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

It can be written as a sum of positive squares in 2 ways, for example, as 261210244 + 636199729 = 16162^2 + 25223^2 .

It is a cyclic number.

It is not a de Polignac number, because 897409973 - 2⁸ = 897409717 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 (897409913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47540 + ... + 63677.

It is an arithmetic number, because the mean of its divisors is an integer number (224382315).

Almost surely, 2^897409973 is an apocalyptic number.

It is an amenable number.

897409973 is a deficient number, since it is larger than the sum of its proper divisors (119287).

897409973 is a wasteful number, since it uses less digits than its factorization.

897409973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119286.

The product of its (nonzero) digits is 3429216, while the sum is 56.

The square root of 897409973 is about 29956.8017818992. The cubic root of 897409973 is about 964.5623304548.

The spelling of 897409973 in words is "eight hundred ninety-seven million, four hundred nine thousand, nine hundred seventy-three".