83988197 has 2 divisors, whose sum is σ = 83988198. Its totient is φ = 83988196.

The previous prime is 83988193. The next prime is 83988209. The reversal of 83988197 is 79188938.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 82609921 + 1378276 = 9089^2 + 1174^2 .

It is a cyclic number.

It is not a de Polignac number, because 83988197 - 2² = 83988193 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83988193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41994098 + 41994099.

It is an arithmetic number, because the mean of its divisors is an integer number (41994099).

Almost surely, 2^83988197 is an apocalyptic number.

It is an amenable number.

83988197 is a deficient number, since it is larger than the sum of its proper divisors (1).

83988197 is an equidigital number, since it uses as much as digits as its factorization.

83988197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 870912, while the sum is 53.

The square root of 83988197 is about 9164.5074608513. The cubic root of 83988197 is about 437.9314005421.

The spelling of 83988197 in words is "eighty-three million, nine hundred eighty-eight thousand, one hundred ninety-seven".