103131109 has 4 divisors (see below), whose sum is σ = 103174816. Its totient is φ = 103087404.

The previous prime is 103131101. The next prime is 103131137. The reversal of 103131109 is 901131301.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 103131109 - 2³ = 103131101 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 (103131101) 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, 18099 + ... + 23104.

It is an arithmetic number, because the mean of its divisors is an integer number (25793704).

Almost surely, 2^103131109 is an apocalyptic number.

It is an amenable number.

103131109 is a deficient number, since it is larger than the sum of its proper divisors (43707).

103131109 is an equidigital number, since it uses as much as digits as its factorization.

103131109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43706.

The product of its (nonzero) digits is 81, while the sum is 19.

The square root of 103131109 is about 10155.3487877079. The cubic root of 103131109 is about 468.9536235574.

The spelling of 103131109 in words is "one hundred three million, one hundred thirty-one thousand, one hundred nine".