90197111 has 2 divisors, whose sum is σ = 90197112. Its totient is φ = 90197110.

The previous prime is 90197077. The next prime is 90197117. The reversal of 90197111 is 11179109.

It is a strong prime.

It is an emirp because it is prime and its reverse (11179109) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90197111 - 2¹⁸ = 89934967 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 (90197117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45098555 + 45098556.

It is an arithmetic number, because the mean of its divisors is an integer number (45098556).

Almost surely, 2^90197111 is an apocalyptic number.

90197111 is a deficient number, since it is larger than the sum of its proper divisors (1).

90197111 is an equidigital number, since it uses as much as digits as its factorization.

90197111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 567, while the sum is 29.

The square root of 90197111 is about 9497.2159604802. The cubic root of 90197111 is about 448.4673969093.

The spelling of 90197111 in words is "ninety million, one hundred ninety-seven thousand, one hundred eleven".