90722101109 has 2 divisors, whose sum is σ = 90722101110. Its totient is φ = 90722101108.

The previous prime is 90722101087. The next prime is 90722101159. The reversal of 90722101109 is 90110122709.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62811386884 + 27910714225 = 250622^2 + 167065^2 .

It is an emirp because it is prime and its reverse (90110122709) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90722101109 - 2³⁶ = 22002624373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90722101159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45361050554 + 45361050555.

It is an arithmetic number, because the mean of its divisors is an integer number (45361050555).

Almost surely, 2^90722101109 is an apocalyptic number.

It is an amenable number.

90722101109 is a deficient number, since it is larger than the sum of its proper divisors (1).

90722101109 is an equidigital number, since it uses as much as digits as its factorization.

90722101109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2268, while the sum is 32.

The spelling of 90722101109 in words is "ninety billion, seven hundred twenty-two million, one hundred one thousand, one hundred nine".