90681773 has 16 divisors (see below), whose sum is σ = 111888000. Its totient is φ = 71568576.

The previous prime is 90681769. The next prime is 90681779. The reversal of 90681773 is 37718609.

It is not a de Polignac number, because 90681773 - 2² = 90681769 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 90681773.

It is a congruent 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 15 ways as a sum of consecutive naturals, for example, 44411 + ... + 46407.

It is an arithmetic number, because the mean of its divisors is an integer number (6993000).

Almost surely, 2^90681773 is an apocalyptic number.

It is an amenable number.

90681773 is a deficient number, since it is larger than the sum of its proper divisors (21206227).

90681773 is a wasteful number, since it uses less digits than its factorization.

90681773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2516.

The product of its (nonzero) digits is 63504, while the sum is 41.

The square root of 90681773 is about 9522.6977795161. The cubic root of 90681773 is about 449.2692221255.

The spelling of 90681773 in words is "ninety million, six hundred eighty-one thousand, seven hundred seventy-three".