90497171 has 12 divisors (see below), whose sum is σ = 101199480. Its totient is φ = 80686080.

The previous prime is 90497161. The next prime is 90497189. The reversal of 90497171 is 17179409.

It is a de Polignac number, because none of the positive numbers 2^k-90497171 is a prime.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90497161) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2750 + ... + 13731.

It is an arithmetic number, because the mean of its divisors is an integer number (8433290).

Almost surely, 2^90497171 is an apocalyptic number.

90497171 is a deficient number, since it is larger than the sum of its proper divisors (10702309).

90497171 is a wasteful number, since it uses less digits than its factorization.

90497171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16534 (or 16517 counting only the distinct ones).

The product of its (nonzero) digits is 15876, while the sum is 38.

The square root of 90497171 is about 9513.0001051193. Note that the first 3 decimals coincide. The cubic root of 90497171 is about 448.9641540621.

The spelling of 90497171 in words is "ninety million, four hundred ninety-seven thousand, one hundred seventy-one".