72118103 has 2 divisors, whose sum is σ = 72118104. Its totient is φ = 72118102.

The previous prime is 72118061. The next prime is 72118147. The reversal of 72118103 is 30181127.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (30181127) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72118103 - 2¹⁰ = 72117079 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72118153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36059051 + 36059052.

It is an arithmetic number, because the mean of its divisors is an integer number (36059052).

Almost surely, 2^72118103 is an apocalyptic number.

72118103 is a deficient number, since it is larger than the sum of its proper divisors (1).

72118103 is an equidigital number, since it uses as much as digits as its factorization.

72118103 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 336, while the sum is 23.

The square root of 72118103 is about 8492.2378087286. The cubic root of 72118103 is about 416.2441071469.

The spelling of 72118103 in words is "seventy-two million, one hundred eighteen thousand, one hundred three".