72223967 has 4 divisors (see below), whose sum is σ = 72391200. Its totient is φ = 72056736.

The previous prime is 72223903. The next prime is 72223999. The reversal of 72223967 is 76932227.

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 72223967 - 2⁶ = 72223903 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 72223967.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72223267) 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, 82967 + ... + 83832.

It is an arithmetic number, because the mean of its divisors is an integer number (18097800).

Almost surely, 2^72223967 is an apocalyptic number.

72223967 is a deficient number, since it is larger than the sum of its proper divisors (167233).

72223967 is a wasteful number, since it uses less digits than its factorization.

72223967 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167232.

The product of its digits is 63504, while the sum is 38.

The square root of 72223967 is about 8498.4685090903. The cubic root of 72223967 is about 416.4476793449.

The spelling of 72223967 in words is "seventy-two million, two hundred twenty-three thousand, nine hundred sixty-seven".