97812138 has 16 divisors (see below), whose sum is σ = 195751296. Its totient is φ = 32582880.

The previous prime is 97812103. The next prime is 97812139. The reversal of 97812138 is 83121879.

It is a junction number, because it is equal to n+sod(n) for n = 97812096 and 97812105.

It is not an unprimeable number, because it can be changed into a prime (97812139) 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, 6870 + ... + 15582.

It is an arithmetic number, because the mean of its divisors is an integer number (12234456).

Almost surely, 2^97812138 is an apocalyptic number.

97812138 is an abundant number, since it is smaller than the sum of its proper divisors (97939158).

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

97812138 is a wasteful number, since it uses less digits than its factorization.

97812138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10589.

The product of its digits is 24192, while the sum is 39.

The square root of 97812138 is about 9890.0019211323. The cubic root of 97812138 is about 460.7488401530.

The spelling of 97812138 in words is "ninety-seven million, eight hundred twelve thousand, one hundred thirty-eight".