90169097 has 2 divisors, whose sum is σ = 90169098. Its totient is φ = 90169096.

The previous prime is 90169087. The next prime is 90169133. The reversal of 90169097 is 79096109.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59043856 + 31125241 = 7684^2 + 5579^2 .

It is an emirp because it is prime and its reverse (79096109) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90169097 - 2²² = 85974793 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (90169087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45084548 + 45084549.

It is an arithmetic number, because the mean of its divisors is an integer number (45084549).

Almost surely, 2^90169097 is an apocalyptic number.

It is an amenable number.

90169097 is a deficient number, since it is larger than the sum of its proper divisors (1).

90169097 is an equidigital number, since it uses as much as digits as its factorization.

90169097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30618, while the sum is 41.

The square root of 90169097 is about 9495.7409926767. The cubic root of 90169097 is about 448.4209628036.

The spelling of 90169097 in words is "ninety million, one hundred sixty-nine thousand, ninety-seven".