72246919 has 2 divisors, whose sum is σ = 72246920. Its totient is φ = 72246918.

The previous prime is 72246901. The next prime is 72246929. The reversal of 72246919 is 91964227.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72246919 - 2¹¹ = 72244871 is a prime.

It is a super-2 number, since 2×72246919² = 10439234609985122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72246929) 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 as a sum of consecutive naturals, namely, 36123459 + 36123460.

It is an arithmetic number, because the mean of its divisors is an integer number (36123460).

Almost surely, 2^72246919 is an apocalyptic number.

72246919 is a deficient number, since it is larger than the sum of its proper divisors (1).

72246919 is an equidigital number, since it uses as much as digits as its factorization.

72246919 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54432, while the sum is 40.

The square root of 72246919 is about 8499.8187627737. The cubic root of 72246919 is about 416.4917888707.

The spelling of 72246919 in words is "seventy-two million, two hundred forty-six thousand, nine hundred nineteen".