131607811 has 2 divisors, whose sum is σ = 131607812. Its totient is φ = 131607810.

The previous prime is 131607793. The next prime is 131607869. The reversal of 131607811 is 118706131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 131607811 - 2¹¹ = 131605763 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 131607811.

It is not a weakly prime, because it can be changed into another prime (131607881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65803905 + 65803906.

It is an arithmetic number, because the mean of its divisors is an integer number (65803906).

Almost surely, 2^131607811 is an apocalyptic number.

131607811 is a deficient number, since it is larger than the sum of its proper divisors (1).

131607811 is an equidigital number, since it uses as much as digits as its factorization.

131607811 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 28.

The square root of 131607811 is about 11472.0447610703. The cubic root of 131607811 is about 508.6595724555.

It can be divided in two parts, 13 and 1607811, that added together give a square (1607824 = 1268²).

The spelling of 131607811 in words is "one hundred thirty-one million, six hundred seven thousand, eight hundred eleven".