78103 has 4 divisors (see below), whose sum is σ = 79128. Its totient is φ = 77080.

The previous prime is 78101. The next prime is 78121. The reversal of 78103 is 30187.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 78103 - 2¹ = 78101 is a prime.

It is a super-2 number, since 2×78103² = 12200157218, which contains 22 as substring.

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

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 388 + ... + 553.

It is an arithmetic number, because the mean of its divisors is an integer number (19782).

2⁷⁸¹⁰³ is an apocalyptic number.

78103 is a deficient number, since it is larger than the sum of its proper divisors (1025).

78103 is an equidigital number, since it uses as much as digits as its factorization.

78103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1024.

The product of its (nonzero) digits is 168, while the sum is 19.

The square root of 78103 is about 279.4691396201. The cubic root of 78103 is about 42.7453855466.

It can be divided in two parts, 78 and 103, that added together give a palindrome (181).

The spelling of 78103 in words is "seventy-eight thousand, one hundred three".