90249109 has 2 divisors, whose sum is σ = 90249110. Its totient is φ = 90249108.

The previous prime is 90249101. The next prime is 90249113. The reversal of 90249109 is 90194209.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60109009 + 30140100 = 7753^2 + 5490^2 .

It is a cyclic number.

It is not a de Polignac number, because 90249109 - 2³ = 90249101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90249101) 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, 45124554 + 45124555.

It is an arithmetic number, because the mean of its divisors is an integer number (45124555).

Almost surely, 2^90249109 is an apocalyptic number.

It is an amenable number.

90249109 is a deficient number, since it is larger than the sum of its proper divisors (1).

90249109 is an equidigital number, since it uses as much as digits as its factorization.

90249109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5832, while the sum is 34.

The square root of 90249109 is about 9499.9531051474. The cubic root of 90249109 is about 448.5535597871.

The spelling of 90249109 in words is "ninety million, two hundred forty-nine thousand, one hundred nine".