131303785 has 4 divisors (see below), whose sum is σ = 157564548. Its totient is φ = 105043024.

The previous prime is 131303741. The next prime is 131303797. The reversal of 131303785 is 587303131.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 587303131 = 17 ⋅34547243.

It can be written as a sum of positive squares in 2 ways, for example, as 26998416 + 104305369 = 5196^2 + 10213^2 .

It is a cyclic number.

It is not a de Polignac number, because 131303785 - 2⁹ = 131303273 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13130374 + ... + 13130383.

It is an arithmetic number, because the mean of its divisors is an integer number (39391137).

Almost surely, 2^131303785 is an apocalyptic number.

It is an amenable number.

131303785 is a deficient number, since it is larger than the sum of its proper divisors (26260763).

131303785 is an equidigital number, since it uses as much as digits as its factorization.

131303785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26260762.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 131303785 is about 11458.7863668017. The cubic root of 131303785 is about 508.2675871851.

The spelling of 131303785 in words is "one hundred thirty-one million, three hundred three thousand, seven hundred eighty-five".