90188673 has 24 divisors (see below), whose sum is σ = 125392320. Its totient is φ = 57647520.

The previous prime is 90188663. The next prime is 90188699. The reversal of 90188673 is 37688109.

It is not a de Polignac number, because 90188673 - 2¹⁴ = 90172289 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90188603) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 393723 + ... + 393951.

It is an arithmetic number, because the mean of its divisors is an integer number (5224680).

Almost surely, 2^90188673 is an apocalyptic number.

It is an amenable number.

90188673 is a deficient number, since it is larger than the sum of its proper divisors (35203647).

90188673 is a wasteful number, since it uses less digits than its factorization.

90188673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 389 (or 346 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 42.

The square root of 90188673 is about 9496.7717146407. The cubic root of 90188673 is about 448.4534116649.

The spelling of 90188673 in words is "ninety million, one hundred eighty-eight thousand, six hundred seventy-three".