97999878 has 16 divisors (see below), whose sum is σ = 196099056. Its totient is φ = 32650080.

The previous prime is 97999877. The next prime is 97999879. The reversal of 97999878 is 87899979.

It is an interprime number because it is at equal distance from previous prime (97999877) and next prime (97999879).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97999877) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17008 + ... + 22028.

It is an arithmetic number, because the mean of its divisors is an integer number (12256191).

Almost surely, 2^97999878 is an apocalyptic number.

97999878 is an abundant number, since it is smaller than the sum of its proper divisors (98099178).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

97999878 is a wasteful number, since it uses less digits than its factorization.

97999878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8279.

The product of its digits is 20575296, while the sum is 66.

The square root of 97999878 is about 9899.4887746792. The cubic root of 97999878 is about 461.0434378883.

The spelling of 97999878 in words is "ninety-seven million, nine hundred ninety-nine thousand, eight hundred seventy-eight".