131770805 has 4 divisors (see below), whose sum is σ = 158124972. Its totient is φ = 105416640.

The previous prime is 131770789. The next prime is 131770811. The reversal of 131770805 is 508077131.

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 46799281 + 84971524 = 6841^2 + 9218^2 .

It is not a de Polignac number, because 131770805 - 2⁴ = 131770789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 13177076 + ... + 13177085.

It is an arithmetic number, because the mean of its divisors is an integer number (39531243).

Almost surely, 2^131770805 is an apocalyptic number.

It is an amenable number.

131770805 is a deficient number, since it is larger than the sum of its proper divisors (26354167).

131770805 is an equidigital number, since it uses as much as digits as its factorization.

131770805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26354166.

The product of its (nonzero) digits is 5880, while the sum is 32.

The square root of 131770805 is about 11479.1465275080. The cubic root of 131770805 is about 508.8694745233.

The spelling of 131770805 in words is "one hundred thirty-one million, seven hundred seventy thousand, eight hundred five".