131047765 has 4 divisors (see below), whose sum is σ = 157257324. Its totient is φ = 104838208.

The previous prime is 131047759. The next prime is 131047771. The reversal of 131047765 is 567740131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 567740131 = 7 ⋅81105733.

It is an interprime number because it is at equal distance from previous prime (131047759) and next prime (131047771).

It can be written as a sum of positive squares in 2 ways, for example, as 77845329 + 53202436 = 8823^2 + 7294^2 .

It is a cyclic number.

It is not a de Polignac number, because 131047765 - 2⁹ = 131047253 is a prime.

It is a super-2 number, since 2×131047765² = 34347033422990450, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 131047765.

It is a congruent 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, 13104772 + ... + 13104781.

It is an arithmetic number, because the mean of its divisors is an integer number (39314331).

Almost surely, 2^131047765 is an apocalyptic number.

It is an amenable number.

131047765 is a deficient number, since it is larger than the sum of its proper divisors (26209559).

131047765 is an equidigital number, since it uses as much as digits as its factorization.

131047765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26209558.

The product of its (nonzero) digits is 17640, while the sum is 34.

The square root of 131047765 is about 11447.6095758023. The cubic root of 131047765 is about 507.9370271931.

Adding to 131047765 its reverse (567740131), we get a palindrome (698787896).

The spelling of 131047765 in words is "one hundred thirty-one million, forty-seven thousand, seven hundred sixty-five".