86628197 has 2 divisors, whose sum is σ = 86628198. Its totient is φ = 86628196.

The previous prime is 86628127. The next prime is 86628257. The reversal of 86628197 is 79182668.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 69989956 + 16638241 = 8366^2 + 4079^2 .

It is a cyclic number.

It is not a de Polignac number, because 86628197 - 2⁸ = 86627941 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86628127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43314098 + 43314099.

It is an arithmetic number, because the mean of its divisors is an integer number (43314099).

Almost surely, 2^86628197 is an apocalyptic number.

It is an amenable number.

86628197 is a deficient number, since it is larger than the sum of its proper divisors (1).

86628197 is an equidigital number, since it uses as much as digits as its factorization.

86628197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 290304, while the sum is 47.

The square root of 86628197 is about 9307.4269806429. The cubic root of 86628197 is about 442.4726436747.

The spelling of 86628197 in words is "eighty-six million, six hundred twenty-eight thousand, one hundred ninety-seven".