90698 has 8 divisors (see below), whose sum is σ = 137700. Its totient is φ = 44800.

The previous prime is 90697. The next prime is 90703. The reversal of 90698 is 89609.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 80089 + 10609 = 283^2 + 103^2 .

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

It is a super-2 number, since 2×90698² = 16452254408, which contains 22 as substring.

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 90698.

It is not an unprimeable number, because it can be changed into a prime (90697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23 + ... + 426.

2⁹⁰⁶⁹⁸ is an apocalyptic number.

90698 is a deficient number, since it is larger than the sum of its proper divisors (47002).

90698 is a wasteful number, since it uses less digits than its factorization.

90698 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 552.

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 90698 is about 301.1610864637. The cubic root of 90698 is about 44.9296018605.

Subtracting from 90698 its reverse (89609), we obtain a square (1089 = 33²).

It can be divided in two parts, 906 and 98, that multiplied together give a palindrome (88788).

The spelling of 90698 in words is "ninety thousand, six hundred ninety-eight".