320400103 has 2 divisors, whose sum is σ = 320400104. Its totient is φ = 320400102.

The previous prime is 320400077. The next prime is 320400109. The reversal of 320400103 is 301004023.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-320400103 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320400109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160200051 + 160200052.

It is an arithmetic number, because the mean of its divisors is an integer number (160200052).

Almost surely, 2^320400103 is an apocalyptic number.

320400103 is a deficient number, since it is larger than the sum of its proper divisors (1).

320400103 is an equidigital number, since it uses as much as digits as its factorization.

320400103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 320400103 is about 17899.7235453512. The cubic root of 320400103 is about 684.2753293212.

Adding to 320400103 its reverse (301004023), we get a palindrome (621404126).

The spelling of 320400103 in words is "three hundred twenty million, four hundred thousand, one hundred three".