90994 has 4 divisors (see below), whose sum is σ = 136494. Its totient is φ = 45496.

The previous prime is 90989. The next prime is 90997. The reversal of 90994 is 49909.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 49909 = 29 ⋅1721.

It can be written as a sum of positive squares in only one way, i.e., 87025 + 3969 = 295^2 + 63^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a plaindrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (90997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22747 + ... + 22750.

2⁹⁰⁹⁹⁴ is an apocalyptic number.

90994 is a deficient number, since it is larger than the sum of its proper divisors (45500).

90994 is a wasteful number, since it uses less digits than its factorization.

90994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45499.

The product of its (nonzero) digits is 2916, while the sum is 31.

The square root of 90994 is about 301.6521175129. The cubic root of 90994 is about 44.9784258725.

The spelling of 90994 in words is "ninety thousand, nine hundred ninety-four".