72106247 has 2 divisors, whose sum is σ = 72106248. Its totient is φ = 72106246.

The previous prime is 72106241. The next prime is 72106259. The reversal of 72106247 is 74260127.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72106247 - 2⁸ = 72105991 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72106241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36053123 + 36053124.

It is an arithmetic number, because the mean of its divisors is an integer number (36053124).

Almost surely, 2^72106247 is an apocalyptic number.

72106247 is a deficient number, since it is larger than the sum of its proper divisors (1).

72106247 is an equidigital number, since it uses as much as digits as its factorization.

72106247 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4704, while the sum is 29.

The square root of 72106247 is about 8491.5397308144. The cubic root of 72106247 is about 416.2212961356.

The spelling of 72106247 in words is "seventy-two million, one hundred six thousand, two hundred forty-seven".