90175109 has 2 divisors, whose sum is σ = 90175110. Its totient is φ = 90175108.

The previous prime is 90175097. The next prime is 90175117. The reversal of 90175109 is 90157109.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 89680900 + 494209 = 9470^2 + 703^2 .

It is a cyclic number.

It is not a de Polignac number, because 90175109 - 2⁸ = 90174853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90175199) 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, 45087554 + 45087555.

It is an arithmetic number, because the mean of its divisors is an integer number (45087555).

Almost surely, 2^90175109 is an apocalyptic number.

It is an amenable number.

90175109 is a deficient number, since it is larger than the sum of its proper divisors (1).

90175109 is an equidigital number, since it uses as much as digits as its factorization.

90175109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2835, while the sum is 32.

The square root of 90175109 is about 9496.0575503732. The cubic root of 90175109 is about 448.4309286973.

The spelling of 90175109 in words is "ninety million, one hundred seventy-five thousand, one hundred nine".