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103 is a prime number

• 103 can be written using four 4's:

See also 113.
103 has 2 divisors, whose sum is σ = 104. Its totient is φ = 102.

The previous prime is 101. The next prime is 107. The reversal of 103 is 301.

It is a happy number.

103 is an esthetic number in base 12 and base 16, because in such bases its adjacent digits differ by 1.

It is an a-pointer prime, because the next prime (107) can be obtained adding 103 to its sum of digits (4).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 103 - 21 = 101 is a prime.

Together with 101, it forms a pair of twin primes.

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

103 is a modest number, since divided by 3 gives 1 as remainder.

It is a plaindrome in base 8, base 9, base 13, base 15 and base 16.

It is a nialpdrome in base 11, base 12 and base 14.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 92 and 101.

It is a congruent number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51 + 52.

It is an arithmetic number, because the mean of its divisors is an integer number (52).

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

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

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

The product of its (nonzero) digits is 3, while the sum is 4.

The square root of 103 is about 10.1488915651. The cubic root of 103 is about 4.6875481477.

Adding to 103 its reverse (301), we get a palindrome (404).

The spelling of 103 in words is "one hundred three", and thus it is an aban number and an iban number.