72103 has 2 divisors, whose sum is σ = 72104. Its totient is φ = 72102.

The previous prime is 72101. The next prime is 72109. The reversal of 72103 is 30127.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72103 - 2¹ = 72101 is a prime.

Together with 72101, it forms a pair of twin primes.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36051 + 36052.

It is an arithmetic number, because the mean of its divisors is an integer number (36052).

2⁷²¹⁰³ is an apocalyptic number.

72103 is a deficient number, since it is larger than the sum of its proper divisors (1).

72103 is an equidigital number, since it uses as much as digits as its factorization.

72103 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 42, while the sum is 13.

The square root of 72103 is about 268.5200178758. The cubic root of 72103 is about 41.6215048453.

The spelling of 72103 in words is "seventy-two thousand, one hundred three", and thus it is an iban number.