90412108109 has 2 divisors, whose sum is σ = 90412108110. Its totient is φ = 90412108108.

The previous prime is 90412108027. The next prime is 90412108121. The reversal of 90412108109 is 90180121409.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53267255209 + 37144852900 = 230797^2 + 192730^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90412108109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90412108159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45206054054 + 45206054055.

It is an arithmetic number, because the mean of its divisors is an integer number (45206054055).

Almost surely, 2^90412108109 is an apocalyptic number.

It is an amenable number.

90412108109 is a deficient number, since it is larger than the sum of its proper divisors (1).

90412108109 is an equidigital number, since it uses as much as digits as its factorization.

90412108109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 35.

The spelling of 90412108109 in words is "ninety billion, four hundred twelve million, one hundred eight thousand, one hundred nine".