90681771 has 8 divisors (see below), whose sum is σ = 120958864. Its totient is φ = 60429600.

The previous prime is 90681769. The next prime is 90681779. The reversal of 90681771 is 17718609.

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

It is not a de Polignac number, because 90681771 - 2¹ = 90681769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90681779) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5325 + ... + 14481.

It is an arithmetic number, because the mean of its divisors is an integer number (15119858).

Almost surely, 2^90681771 is an apocalyptic number.

90681771 is a deficient number, since it is larger than the sum of its proper divisors (30277093).

90681771 is a wasteful number, since it uses less digits than its factorization.

90681771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12461.

The product of its (nonzero) digits is 21168, while the sum is 39.

The square root of 90681771 is about 9522.6976745038. The cubic root of 90681771 is about 449.2692188226.

The spelling of 90681771 in words is "ninety million, six hundred eighty-one thousand, seven hundred seventy-one".