72118349 has 2 divisors, whose sum is σ = 72118350. Its totient is φ = 72118348.

The previous prime is 72118339. The next prime is 72118367. The reversal of 72118349 is 94381127.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50197225 + 21921124 = 7085^2 + 4682^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72118349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72118339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36059174 + 36059175.

It is an arithmetic number, because the mean of its divisors is an integer number (36059175).

Almost surely, 2^72118349 is an apocalyptic number.

It is an amenable number.

72118349 is a deficient number, since it is larger than the sum of its proper divisors (1).

72118349 is an equidigital number, since it uses as much as digits as its factorization.

72118349 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12096, while the sum is 35.

The square root of 72118349 is about 8492.2522925311. The cubic root of 72118349 is about 416.2445804258.

The spelling of 72118349 in words is "seventy-two million, one hundred eighteen thousand, three hundred forty-nine".