90117773 has 2 divisors, whose sum is σ = 90117774. Its totient is φ = 90117772.

The previous prime is 90117767. The next prime is 90117787. The reversal of 90117773 is 37771109.

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., 51652969 + 38464804 = 7187^2 + 6202^2 .

It is an emirp because it is prime and its reverse (37771109) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90117773 - 2⁴ = 90117757 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90117763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45058886 + 45058887.

It is an arithmetic number, because the mean of its divisors is an integer number (45058887).

Almost surely, 2^90117773 is an apocalyptic number.

It is an amenable number.

90117773 is a deficient number, since it is larger than the sum of its proper divisors (1).

90117773 is an equidigital number, since it uses as much as digits as its factorization.

90117773 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9261, while the sum is 35.

The square root of 90117773 is about 9493.0381332848. The cubic root of 90117773 is about 448.3358666665.

The spelling of 90117773 in words is "ninety million, one hundred seventeen thousand, seven hundred seventy-three".