103420643 has 2 divisors, whose sum is σ = 103420644. Its totient is φ = 103420642.

The previous prime is 103420609. The next prime is 103420693. The reversal of 103420643 is 346024301.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-103420643 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (103420693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51710321 + 51710322.

It is an arithmetic number, because the mean of its divisors is an integer number (51710322).

Almost surely, 2^103420643 is an apocalyptic number.

103420643 is a deficient number, since it is larger than the sum of its proper divisors (1).

103420643 is an equidigital number, since it uses as much as digits as its factorization.

103420643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 103420643 is about 10169.5940430285. The cubic root of 103420643 is about 469.3920659598.

Adding to 103420643 its reverse (346024301), we get a palindrome (449444944).

The spelling of 103420643 in words is "one hundred three million, four hundred twenty thousand, six hundred forty-three".