72837223 has 4 divisors (see below), whose sum is σ = 72873808. Its totient is φ = 72800640.

The previous prime is 72837221. The next prime is 72837257. The reversal of 72837223 is 32273827.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 72837223 - 2¹ = 72837221 is a prime.

It is a super-2 number, since 2×72837223² = 10610522108703458, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72837221) 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, 15123 + ... + 19348.

It is an arithmetic number, because the mean of its divisors is an integer number (18218452).

Almost surely, 2^72837223 is an apocalyptic number.

72837223 is a deficient number, since it is larger than the sum of its proper divisors (36585).

72837223 is a wasteful number, since it uses less digits than its factorization.

72837223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36584.

The product of its digits is 28224, while the sum is 34.

The square root of 72837223 is about 8534.4726257690. The cubic root of 72837223 is about 417.6230490568.

The spelling of 72837223 in words is "seventy-two million, eight hundred thirty-seven thousand, two hundred twenty-three".