131153809 has 2 divisors, whose sum is σ = 131153810. Its totient is φ = 131153808.

The previous prime is 131153801. The next prime is 131153819. The reversal of 131153809 is 908351131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 84272400 + 46881409 = 9180^2 + 6847^2 .

It is an emirp because it is prime and its reverse (908351131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 131153809 - 2³ = 131153801 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (131153801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65576904 + 65576905.

It is an arithmetic number, because the mean of its divisors is an integer number (65576905).

Almost surely, 2^131153809 is an apocalyptic number.

It is an amenable number.

131153809 is a deficient number, since it is larger than the sum of its proper divisors (1).

131153809 is an equidigital number, since it uses as much as digits as its factorization.

131153809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3240, while the sum is 31.

The square root of 131153809 is about 11452.2403485082. The cubic root of 131153809 is about 508.0739979936.

The spelling of 131153809 in words is "one hundred thirty-one million, one hundred fifty-three thousand, eight hundred nine".