72002647 has 4 divisors (see below), whose sum is σ = 75792280. Its totient is φ = 68213016.

The previous prime is 72002641. The next prime is 72002659. The reversal of 72002647 is 74620027.

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 72002647 - 2³ = 72002639 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 (72002641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1894788 + ... + 1894825.

It is an arithmetic number, because the mean of its divisors is an integer number (18948070).

Almost surely, 2^72002647 is an apocalyptic number.

72002647 is a deficient number, since it is larger than the sum of its proper divisors (3789633).

72002647 is a wasteful number, since it uses less digits than its factorization.

72002647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3789632.

The product of its (nonzero) digits is 4704, while the sum is 28.

The square root of 72002647 is about 8485.4373487758. The cubic root of 72002647 is about 416.0218626793.

The spelling of 72002647 in words is "seventy-two million, two thousand, six hundred forty-seven".