89947 has 16 divisors (see below), whose sum is σ = 114912. Its totient is φ = 69120.

The previous prime is 89939. The next prime is 89959. The reversal of 89947 is 74998.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 89947 - 2³ = 89939 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is an Ulam number.

It is a Duffinian number.

89947 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (89917) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2413 + ... + 2449.

It is an arithmetic number, because the mean of its divisors is an integer number (7182).

2⁸⁹⁹⁴⁷ is an apocalyptic number.

89947 is a deficient number, since it is larger than the sum of its proper divisors (24965).

89947 is a wasteful number, since it uses less digits than its factorization.

89947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78.

The product of its digits is 18144, while the sum is 37.

The square root of 89947 is about 299.9116536582. The cubic root of 89947 is about 44.8052489067.

It can be divided in two parts, 899 and 47, that added together give a triangular number (946 = T₄₃).

The spelling of 89947 in words is "eighty-nine thousand, nine hundred forty-seven".