897916207 has 4 divisors (see below), whose sum is σ = 897991120. Its totient is φ = 897841296.

The previous prime is 897916189. The next prime is 897916213. The reversal of 897916207 is 702619798.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a 4-Lehmer number, since φ(897916207) divides (897916207-1)⁴.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-897916207 is a prime.

It is a deceptive number, since it divides R_897916206.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (897916007) 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, 14982 + ... + 44947.

It is an arithmetic number, because the mean of its divisors is an integer number (224497780).

Almost surely, 2^897916207 is an apocalyptic number.

897916207 is the 14983-rd decagonal number.

897916207 is a deficient number, since it is larger than the sum of its proper divisors (74913).

897916207 is a wasteful number, since it uses less digits than its factorization.

897916207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74912.

The product of its (nonzero) digits is 381024, while the sum is 49.

The square root of 897916207 is about 29965.2499906141. The cubic root of 897916207 is about 964.7436680350.

The spelling of 897916207 in words is "eight hundred ninety-seven million, nine hundred sixteen thousand, two hundred seven".