93989 has 8 divisors (see below), whose sum is σ = 111360. Its totient is φ = 77616.

The previous prime is 93983. The next prime is 93997. The reversal of 93989 is 98939.

93989 = 176² + 177² + 178².

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

It is a de Polignac number, because none of the positive numbers 2^k-93989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (93983) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29 + ... + 434.

It is an arithmetic number, because the mean of its divisors is an integer number (13920).

2⁹³⁹⁸⁹ is an apocalyptic number.

It is an amenable number.

93989 is a deficient number, since it is larger than the sum of its proper divisors (17371).

93989 is a wasteful number, since it uses less digits than its factorization.

93989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 499.

The product of its digits is 17496, while the sum is 38.

The square root of 93989 is about 306.5762547883. The cubic root of 93989 is about 45.4665857801.

Subtracting 93989 from its reverse (98939), we obtain a triangular number (4950 = T₉₉).

The spelling of 93989 in words is "ninety-three thousand, nine hundred eighty-nine".