103440643 has 4 divisors (see below), whose sum is σ = 103502880. Its totient is φ = 103378408.

The previous prime is 103440619. The next prime is 103440713. The reversal of 103440643 is 346044301.

It is a happy number.

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 103440643 - 2¹³ = 103432451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (103440143) 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, 28555 + ... + 31972.

It is an arithmetic number, because the mean of its divisors is an integer number (25875720).

Almost surely, 2^103440643 is an apocalyptic number.

103440643 is a deficient number, since it is larger than the sum of its proper divisors (62237).

103440643 is an equidigital number, since it uses as much as digits as its factorization.

103440643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62236.

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 103440643 is about 10170.5773189136. The cubic root of 103440643 is about 469.4223218028.

Adding to 103440643 its reverse (346044301), we get a palindrome (449484944).

The spelling of 103440643 in words is "one hundred three million, four hundred forty thousand, six hundred forty-three".