131020109 has 8 divisors (see below), whose sum is σ = 144268128. Its totient is φ = 117994960.

The previous prime is 131020103. The next prime is 131020117. The reversal of 131020109 is 901020131.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 131020109 - 2⁴ = 131020093 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 (131020103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54482 + ... + 56835.

It is an arithmetic number, because the mean of its divisors is an integer number (18033516).

Almost surely, 2^131020109 is an apocalyptic number.

It is an amenable number.

131020109 is a deficient number, since it is larger than the sum of its proper divisors (13248019).

131020109 is a wasteful number, since it uses less digits than its factorization.

131020109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111435.

The product of its (nonzero) digits is 54, while the sum is 17.

The square root of 131020109 is about 11446.4015742940. The cubic root of 131020109 is about 507.9012934164.

The spelling of 131020109 in words is "one hundred thirty-one million, twenty thousand, one hundred nine".