97878897 has 12 divisors (see below), whose sum is σ = 141603124. Its totient is φ = 65149920.

The previous prime is 97878883. The next prime is 97878901. The reversal of 97878897 is 79887879.

It can be written as a sum of positive squares in 2 ways, for example, as 84658401 + 13220496 = 9201^2 + 3636^2 .

It is a de Polignac number, because none of the positive numbers 2^k-97878897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (97874897) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2278 + ... + 14175.

Almost surely, 2^97878897 is an apocalyptic number.

It is an amenable number.

97878897 is a deficient number, since it is larger than the sum of its proper divisors (43724227).

97878897 is a wasteful number, since it uses less digits than its factorization.

97878897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17120 (or 17117 counting only the distinct ones).

The product of its digits is 14224896, while the sum is 63.

The square root of 97878897 is about 9893.3764206160. The cubic root of 97878897 is about 460.8536401542.

The spelling of 97878897 in words is "ninety-seven million, eight hundred seventy-eight thousand, eight hundred ninety-seven".