897122305 has 4 divisors (see below), whose sum is σ = 1076546772. Its totient is φ = 717697840.

The previous prime is 897122273. The next prime is 897122309. The reversal of 897122305 is 503221798.

It is a Cunningham number, because it is equal to 29952²+1.

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 322992784 + 574129521 = 17972^2 + 23961^2 .

It is not a de Polignac number, because 897122305 - 2⁵ = 897122273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (897122309) 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, 89712226 + ... + 89712235.

It is an arithmetic number, because the mean of its divisors is an integer number (269136693).

It is a Proth number, since it is equal to 13689 ⋅ 2¹⁶ + 1 and 13689 < 2¹⁶.

Almost surely, 2^897122305 is an apocalyptic number.

It is an amenable number.

897122305 is a deficient number, since it is larger than the sum of its proper divisors (179424467).

897122305 is a wasteful number, since it uses less digits than its factorization.

897122305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179424466.

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 897122305 is about 29952.0000166934. Note that the first 4 decimals coincide. The cubic root of 897122305 is about 964.4592547968.

The spelling of 897122305 in words is "eight hundred ninety-seven million, one hundred twenty-two thousand, three hundred five".