131147761 has 2 divisors, whose sum is σ = 131147762. Its totient is φ = 131147760.

The previous prime is 131147729. The next prime is 131147777. The reversal of 131147761 is 167741131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 124992400 + 6155361 = 11180^2 + 2481^2 .

It is a cyclic number.

It is not a de Polignac number, because 131147761 - 2⁵ = 131147729 is a prime.

It is not a weakly prime, because it can be changed into another prime (131147711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65573880 + 65573881.

It is an arithmetic number, because the mean of its divisors is an integer number (65573881).

Almost surely, 2^131147761 is an apocalyptic number.

It is an amenable number.

131147761 is a deficient number, since it is larger than the sum of its proper divisors (1).

131147761 is an equidigital number, since it uses as much as digits as its factorization.

131147761 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3528, while the sum is 31.

The square root of 131147761 is about 11451.9762923261. The cubic root of 131147761 is about 508.0661881333.

Adding to 131147761 its reverse (167741131), we get a palindrome (298888892).

The spelling of 131147761 in words is "one hundred thirty-one million, one hundred forty-seven thousand, seven hundred sixty-one".