72356117 has 2 divisors, whose sum is σ = 72356118. Its totient is φ = 72356116.

The previous prime is 72356113. The next prime is 72356149. The reversal of 72356117 is 71165327.

It is an a-pointer prime, because the next prime (72356149) can be obtained adding 72356117 to its sum of digits (32).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51251281 + 21104836 = 7159^2 + 4594^2 .

It is an emirp because it is prime and its reverse (71165327) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72356117 - 2² = 72356113 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72356111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36178058 + 36178059.

It is an arithmetic number, because the mean of its divisors is an integer number (36178059).

Almost surely, 2^72356117 is an apocalyptic number.

It is an amenable number.

72356117 is a deficient number, since it is larger than the sum of its proper divisors (1).

72356117 is an equidigital number, since it uses as much as digits as its factorization.

72356117 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8820, while the sum is 32.

The square root of 72356117 is about 8506.2398861071. The cubic root of 72356117 is about 416.7015195024.

The spelling of 72356117 in words is "seventy-two million, three hundred fifty-six thousand, one hundred seventeen".