97897451 has 4 divisors (see below), whose sum is σ = 97920600. Its totient is φ = 97874304.

The previous prime is 97897447. The next prime is 97897477. The reversal of 97897451 is 15479879.

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

It is a cyclic number.

It is not a de Polignac number, because 97897451 - 2² = 97897447 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 97897451.

It is not an unprimeable number, because it can be changed into a prime (97897351) 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, 3221 + ... + 14358.

It is an arithmetic number, because the mean of its divisors is an integer number (24480150).

Almost surely, 2^97897451 is an apocalyptic number.

97897451 is a deficient number, since it is larger than the sum of its proper divisors (23149).

97897451 is a wasteful number, since it uses less digits than its factorization.

97897451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23148.

The product of its digits is 635040, while the sum is 50.

The square root of 97897451 is about 9894.3140742550. The cubic root of 97897451 is about 460.8827582394.

The spelling of 97897451 in words is "ninety-seven million, eight hundred ninety-seven thousand, four hundred fifty-one".