97278497 has 4 divisors (see below), whose sum is σ = 97685760. Its totient is φ = 96871236.

The previous prime is 97278481. The next prime is 97278521. The reversal of 97278497 is 79487279.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 97278497 - 2⁴ = 97278481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (97278457) 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, 203273 + ... + 203750.

It is an arithmetic number, because the mean of its divisors is an integer number (24421440).

Almost surely, 2^97278497 is an apocalyptic number.

It is an amenable number.

97278497 is a deficient number, since it is larger than the sum of its proper divisors (407263).

97278497 is a wasteful number, since it uses less digits than its factorization.

97278497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407262.

The product of its digits is 1778112, while the sum is 53.

The square root of 97278497 is about 9862.9862110823. The cubic root of 97278497 is about 459.9093977200.

The spelling of 97278497 in words is "ninety-seven million, two hundred seventy-eight thousand, four hundred ninety-seven".