97831882 has 4 divisors (see below), whose sum is σ = 146747826. Its totient is φ = 48915940.

The previous prime is 97831879. The next prime is 97831883. The reversal of 97831882 is 28813879.

It is a Cunningham number, because it is equal to 9891²+1.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 28813879 = 463 ⋅62233.

It can be written as a sum of positive squares in only one way, i.e., 97831881 + 1 = 9891^2 + 1^2 .

It is not an unprimeable number, because it can be changed into a prime (97831883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24457969 + ... + 24457972.

Almost surely, 2^97831882 is an apocalyptic number.

97831882 is a deficient number, since it is larger than the sum of its proper divisors (48915944).

97831882 is a wasteful number, since it uses less digits than its factorization.

97831882 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48915943.

The product of its digits is 193536, while the sum is 46.

The square root of 97831882 is about 9891.0000505510. Note that the first 4 decimals coincide. The cubic root of 97831882 is about 460.7798397585.

The spelling of 97831882 in words is "ninety-seven million, eight hundred thirty-one thousand, eight hundred eighty-two".