72239927 has 2 divisors, whose sum is σ = 72239928. Its totient is φ = 72239926.

The previous prime is 72239917. The next prime is 72239929. The reversal of 72239927 is 72993227.

It is a strong prime.

It is an emirp because it is prime and its reverse (72993227) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72239927 is a prime.

Together with 72239929, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72239929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36119963 + 36119964.

It is an arithmetic number, because the mean of its divisors is an integer number (36119964).

Almost surely, 2^72239927 is an apocalyptic number.

72239927 is a deficient number, since it is larger than the sum of its proper divisors (1).

72239927 is an equidigital number, since it uses as much as digits as its factorization.

72239927 is an evil number, because the sum of its binary digits is even.

The product of its digits is 95256, while the sum is 41.

The square root of 72239927 is about 8499.4074499344. The cubic root of 72239927 is about 416.4783525213.

The spelling of 72239927 in words is "seventy-two million, two hundred thirty-nine thousand, nine hundred twenty-seven".