72412229 has 2 divisors, whose sum is σ = 72412230. Its totient is φ = 72412228.

The previous prime is 72412199. The next prime is 72412243. The reversal of 72412229 is 92221427.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43230625 + 29181604 = 6575^2 + 5402^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72412229 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 (72412259) 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, 36206114 + 36206115.

It is an arithmetic number, because the mean of its divisors is an integer number (36206115).

Almost surely, 2^72412229 is an apocalyptic number.

It is an amenable number.

72412229 is a deficient number, since it is larger than the sum of its proper divisors (1).

72412229 is an equidigital number, since it uses as much as digits as its factorization.

72412229 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4032, while the sum is 29.

The square root of 72412229 is about 8509.5375314996. The cubic root of 72412229 is about 416.8092086885.

The spelling of 72412229 in words is "seventy-two million, four hundred twelve thousand, two hundred twenty-nine".