72006247 has 2 divisors, whose sum is σ = 72006248. Its totient is φ = 72006246.

The previous prime is 72006229. The next prime is 72006269. The reversal of 72006247 is 74260027.

It is a weak prime.

It is an emirp because it is prime and its reverse (74260027) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72006247 - 2¹⁵ = 71973479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72006287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36003123 + 36003124.

It is an arithmetic number, because the mean of its divisors is an integer number (36003124).

Almost surely, 2^72006247 is an apocalyptic number.

72006247 is a deficient number, since it is larger than the sum of its proper divisors (1).

72006247 is an equidigital number, since it uses as much as digits as its factorization.

72006247 is an evil number, because the sum of its binary digits is even.

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

The square root of 72006247 is about 8485.6494742595. The cubic root of 72006247 is about 416.0287960065.

The spelling of 72006247 in words is "seventy-two million, six thousand, two hundred forty-seven".