103500643 has 4 divisors (see below), whose sum is σ = 103640688. Its totient is φ = 103360600.

The previous prime is 103500637. The next prime is 103500653. The reversal of 103500643 is 346005301.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 346005301 = 17 ⋅20353253.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-103500643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (103500653) 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, 68908 + ... + 70393.

It is an arithmetic number, because the mean of its divisors is an integer number (25910172).

Almost surely, 2^103500643 is an apocalyptic number.

103500643 is a deficient number, since it is larger than the sum of its proper divisors (140045).

103500643 is an equidigital number, since it uses as much as digits as its factorization.

103500643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140044.

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 103500643 is about 10173.5265763648. The cubic root of 103500643 is about 469.5130659389.

Adding to 103500643 its reverse (346005301), we get a palindrome (449505944).

The spelling of 103500643 in words is "one hundred three million, five hundred thousand, six hundred forty-three".