229239973 has 4 divisors (see below), whose sum is σ = 229784908. Its totient is φ = 228695040.

The previous prime is 229239961. The next prime is 229239991. The reversal of 229239973 is 379932922.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 379932922 = 2 ⋅189966461.

It can be written as a sum of positive squares in 2 ways, for example, as 22829284 + 206410689 = 4778^2 + 14367^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-229239973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (229239943) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 271836 + ... + 272677.

It is an arithmetic number, because the mean of its divisors is an integer number (57446227).

Almost surely, 2^229239973 is an apocalyptic number.

It is an amenable number.

229239973 is a deficient number, since it is larger than the sum of its proper divisors (544935).

229239973 is an equidigital number, since it uses as much as digits as its factorization.

229239973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 544934.

The product of its digits is 367416, while the sum is 46.

The square root of 229239973 is about 15140.6728053941. The cubic root of 229239973 is about 612.0169490301.

It can be divided in two parts, 22923 and 9973, that added together give a triangular number (32896 = T₂₅₆).

The spelling of 229239973 in words is "two hundred twenty-nine million, two hundred thirty-nine thousand, nine hundred seventy-three".