897228401 has 4 divisors (see below), whose sum is σ = 897626100. Its totient is φ = 896830704.

The previous prime is 897228391. The next prime is 897228407. The reversal of 897228401 is 104822798.

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 191794801 + 705433600 = 13849^2 + 26560^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-897228401 is a prime.

It is a super-2 number, since 2×897228401² = 1610037607122033602, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (897228407) 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, 195446 + ... + 199983.

It is an arithmetic number, because the mean of its divisors is an integer number (224406525).

Almost surely, 2^897228401 is an apocalyptic number.

It is an amenable number.

897228401 is a deficient number, since it is larger than the sum of its proper divisors (397699).

897228401 is a wasteful number, since it uses less digits than its factorization.

897228401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 397698.

The product of its (nonzero) digits is 64512, while the sum is 41.

The square root of 897228401 is about 29953.7710647591. The cubic root of 897228401 is about 964.4972731120.

It can be divided in two parts, 8972 and 28401, that added together give a palindrome (37373).

The spelling of 897228401 in words is "eight hundred ninety-seven million, two hundred twenty-eight thousand, four hundred one".