90090991727 has 8 divisors (see below), whose sum is σ = 98332641792. Its totient is φ = 81857935000.

The previous prime is 90090991723. The next prime is 90090991787. The reversal of 90090991727 is 72719909009.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 90090991727 - 2² = 90090991723 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90090991723) 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 in 7 ways as a sum of consecutive naturals, for example, 2126399 + ... + 2168352.

It is an arithmetic number, because the mean of its divisors is an integer number (12291580224).

Almost surely, 2^90090991727 is an apocalyptic number.

90090991727 is a deficient number, since it is larger than the sum of its proper divisors (8241650065).

90090991727 is a wasteful number, since it uses less digits than its factorization.

90090991727 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4296669.

The product of its (nonzero) digits is 642978, while the sum is 53.

The spelling of 90090991727 in words is "ninety billion, ninety million, nine hundred ninety-one thousand, seven hundred twenty-seven".