72304647 has 4 divisors (see below), whose sum is σ = 96406200. Its totient is φ = 48203096.

The previous prime is 72304643. The next prime is 72304651. The reversal of 72304647 is 74640327.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74640327 = 3 ⋅24880109.

It is an interprime number because it is at equal distance from previous prime (72304643) and next prime (72304651).

It is a cyclic number.

It is not a de Polignac number, because 72304647 - 2² = 72304643 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72304643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12050772 + ... + 12050777.

It is an arithmetic number, because the mean of its divisors is an integer number (24101550).

Almost surely, 2^72304647 is an apocalyptic number.

72304647 is a deficient number, since it is larger than the sum of its proper divisors (24101553).

72304647 is a wasteful number, since it uses less digits than its factorization.

72304647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24101552.

The product of its (nonzero) digits is 28224, while the sum is 33.

The square root of 72304647 is about 8503.2139218063. The cubic root of 72304647 is about 416.6026901951.

The spelling of 72304647 in words is "seventy-two million, three hundred four thousand, six hundred forty-seven".