103909213 has 4 divisors (see below), whose sum is σ = 104980540. Its totient is φ = 102837888.

The previous prime is 103909189. The next prime is 103909249. The reversal of 103909213 is 312909301.

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

It can be written as a sum of positive squares in 2 ways, for example, as 86620249 + 17288964 = 9307^2 + 4158^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-103909213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103900213) 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, 535518 + ... + 535711.

It is an arithmetic number, because the mean of its divisors is an integer number (26245135).

Almost surely, 2^103909213 is an apocalyptic number.

It is an amenable number.

103909213 is a deficient number, since it is larger than the sum of its proper divisors (1071327).

103909213 is an equidigital number, since it uses as much as digits as its factorization.

103909213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1071326.

The product of its (nonzero) digits is 1458, while the sum is 28.

The square root of 103909213 is about 10193.5868564505. The cubic root of 103909213 is about 470.1300575640.

The spelling of 103909213 in words is "one hundred three million, nine hundred nine thousand, two hundred thirteen".