897402569 has 8 divisors (see below), whose sum is σ = 1070194560. Its totient is φ = 735758496.

The previous prime is 897402563. The next prime is 897402577. The reversal of 897402569 is 965204798.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 897402569 - 2⁸ = 897402313 is a prime.

It is a super-2 number, since 2×897402569² = 1610662741695599522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (897402563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2786804 + ... + 2787125.

It is an arithmetic number, because the mean of its divisors is an integer number (133774320).

Almost surely, 2^897402569 is an apocalyptic number.

It is an amenable number.

897402569 is a deficient number, since it is larger than the sum of its proper divisors (172791991).

897402569 is a wasteful number, since it uses less digits than its factorization.

897402569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5573959.

The product of its (nonzero) digits is 1088640, while the sum is 50.

The square root of 897402569 is about 29956.6782036994. The cubic root of 897402569 is about 964.5596777693.

The spelling of 897402569 in words is "eight hundred ninety-seven million, four hundred two thousand, five hundred sixty-nine".