131069909 has 2 divisors, whose sum is σ = 131069910. Its totient is φ = 131069908.

The previous prime is 131069903. The next prime is 131069987. The reversal of 131069909 is 909960131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 131033809 + 36100 = 11447^2 + 190^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131069909 is a prime.

It is equal to p_7435496 and since 131069909 and 7435496 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131069903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65534954 + 65534955.

It is an arithmetic number, because the mean of its divisors is an integer number (65534955).

Almost surely, 2^131069909 is an apocalyptic number.

It is an amenable number.

131069909 is a deficient number, since it is larger than the sum of its proper divisors (1).

131069909 is an equidigital number, since it uses as much as digits as its factorization.

131069909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13122, while the sum is 38.

The square root of 131069909 is about 11448.5767237679. The cubic root of 131069909 is about 507.9656353983.

The spelling of 131069909 in words is "one hundred thirty-one million, sixty-nine thousand, nine hundred nine".