72239117 has 2 divisors, whose sum is σ = 72239118. Its totient is φ = 72239116.

The previous prime is 72239071. The next prime is 72239119. The reversal of 72239117 is 71193227.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 70879561 + 1359556 = 8419^2 + 1166^2 .

It is a cyclic number.

It is not a de Polignac number, because 72239117 - 2¹⁰ = 72238093 is a prime.

It is a super-3 number, since 3×72239117³ (a number of 25 digits) contains 333 as substring.

Together with 72239119, 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 (72239119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36119558 + 36119559.

It is an arithmetic number, because the mean of its divisors is an integer number (36119559).

Almost surely, 2^72239117 is an apocalyptic number.

It is an amenable number.

72239117 is a deficient number, since it is larger than the sum of its proper divisors (1).

72239117 is an equidigital number, since it uses as much as digits as its factorization.

72239117 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5292, while the sum is 32.

The square root of 72239117 is about 8499.3597994202. The cubic root of 72239117 is about 416.4767959087.

The spelling of 72239117 in words is "seventy-two million, two hundred thirty-nine thousand, one hundred seventeen".