90191141 has 2 divisors, whose sum is σ = 90191142. Its totient is φ = 90191140.

The previous prime is 90191113. The next prime is 90191161. The reversal of 90191141 is 14119109.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 81902500 + 8288641 = 9050^2 + 2879^2 .

It is a cyclic number.

It is not a de Polignac number, because 90191141 - 2²² = 85996837 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 90191141.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90191161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45095570 + 45095571.

It is an arithmetic number, because the mean of its divisors is an integer number (45095571).

Almost surely, 2^90191141 is an apocalyptic number.

It is an amenable number.

90191141 is a deficient number, since it is larger than the sum of its proper divisors (1).

90191141 is an equidigital number, since it uses as much as digits as its factorization.

90191141 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 26.

The square root of 90191141 is about 9496.9016526444. The cubic root of 90191141 is about 448.4575022485.

The spelling of 90191141 in words is "ninety million, one hundred ninety-one thousand, one hundred forty-one".