131808797 has 2 divisors, whose sum is σ = 131808798. Its totient is φ = 131808796.

The previous prime is 131808749. The next prime is 131808829. The reversal of 131808797 is 797808131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 131354521 + 454276 = 11461^2 + 674^2 .

It is a cyclic number.

It is not a de Polignac number, because 131808797 - 2¹⁰ = 131807773 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131808707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65904398 + 65904399.

It is an arithmetic number, because the mean of its divisors is an integer number (65904399).

Almost surely, 2^131808797 is an apocalyptic number.

It is an amenable number.

131808797 is a deficient number, since it is larger than the sum of its proper divisors (1).

131808797 is an equidigital number, since it uses as much as digits as its factorization.

131808797 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 84672, while the sum is 44.

The square root of 131808797 is about 11480.8012351055. The cubic root of 131808797 is about 508.9183753688.

The spelling of 131808797 in words is "one hundred thirty-one million, eight hundred eight thousand, seven hundred ninety-seven".