89999947 has 16 divisors (see below), whose sum is σ = 94556160. Its totient is φ = 85585248.

The previous prime is 89999911. The next prime is 89999969. The reversal of 89999947 is 74999998.

It is a cyclic number.

It is not a de Polignac number, because 89999947 - 2¹¹ = 89997899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (89999047) 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, 502704 + ... + 502882.

It is an arithmetic number, because the mean of its divisors is an integer number (5909760).

Almost surely, 2^89999947 is an apocalyptic number.

89999947 is a deficient number, since it is larger than the sum of its proper divisors (4556213).

89999947 is a wasteful number, since it uses less digits than its factorization.

89999947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 450.

The product of its digits is 13226976, while the sum is 64.

The square root of 89999947 is about 9486.8301871595. The cubic root of 89999947 is about 448.1403866874.

The spelling of 89999947 in words is "eighty-nine million, nine hundred ninety-nine thousand, nine hundred forty-seven".