72324047 has 4 divisors (see below), whose sum is σ = 72510360. Its totient is φ = 72137736.

The previous prime is 72324037. The next prime is 72324067. The reversal of 72324047 is 74042327.

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 72324047 - 2¹⁴ = 72307663 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 (72324037) 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, 92573 + ... + 93350.

It is an arithmetic number, because the mean of its divisors is an integer number (18127590).

Almost surely, 2^72324047 is an apocalyptic number.

72324047 is a deficient number, since it is larger than the sum of its proper divisors (186313).

72324047 is a wasteful number, since it uses less digits than its factorization.

72324047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186312.

The product of its (nonzero) digits is 9408, while the sum is 29.

The square root of 72324047 is about 8504.3545904437. The cubic root of 72324047 is about 416.6399463043.

The spelling of 72324047 in words is "seventy-two million, three hundred twenty-four thousand, forty-seven".