72238919 has 2 divisors, whose sum is σ = 72238920. Its totient is φ = 72238918.

The previous prime is 72238889. The next prime is 72238939. The reversal of 72238919 is 91983227.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72238919 is a prime.

It is a super-2 number, since 2×72238919² = 10436922836577122, 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 (72238939) 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, 36119459 + 36119460.

It is an arithmetic number, because the mean of its divisors is an integer number (36119460).

Almost surely, 2^72238919 is an apocalyptic number.

72238919 is a deficient number, since it is larger than the sum of its proper divisors (1).

72238919 is an equidigital number, since it uses as much as digits as its factorization.

72238919 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54432, while the sum is 41.

The square root of 72238919 is about 8499.3481514761. The cubic root of 72238919 is about 416.4764154017.

The spelling of 72238919 in words is "seventy-two million, two hundred thirty-eight thousand, nine hundred nineteen".