90091177829 has 2 divisors, whose sum is σ = 90091177830. Its totient is φ = 90091177828.

The previous prime is 90091177801. The next prime is 90091177861. The reversal of 90091177829 is 92877119009.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66679117729 + 23412060100 = 258223^2 + 153010^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90091177829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90091177129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45045588914 + 45045588915.

It is an arithmetic number, because the mean of its divisors is an integer number (45045588915).

Almost surely, 2^90091177829 is an apocalyptic number.

It is an amenable number.

90091177829 is a deficient number, since it is larger than the sum of its proper divisors (1).

90091177829 is an equidigital number, since it uses as much as digits as its factorization.

90091177829 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 571536, while the sum is 53.

The spelling of 90091177829 in words is "ninety billion, ninety-one million, one hundred seventy-seven thousand, eight hundred twenty-nine".