72061447 has 2 divisors, whose sum is σ = 72061448. Its totient is φ = 72061446.

The previous prime is 72061417. The next prime is 72061463. The reversal of 72061447 is 74416027.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72061447 - 2¹¹ = 72059399 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 (72061417) 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 as a sum of consecutive naturals, namely, 36030723 + 36030724.

It is an arithmetic number, because the mean of its divisors is an integer number (36030724).

Almost surely, 2^72061447 is an apocalyptic number.

72061447 is a deficient number, since it is larger than the sum of its proper divisors (1).

72061447 is an equidigital number, since it uses as much as digits as its factorization.

72061447 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9408, while the sum is 31.

The square root of 72061447 is about 8488.9014012415. The cubic root of 72061447 is about 416.1350780988.

The spelling of 72061447 in words is "seventy-two million, sixty-one thousand, four hundred forty-seven".