131458109 has 2 divisors, whose sum is σ = 131458110. Its totient is φ = 131458108.

The previous prime is 131458097. The next prime is 131458147. The reversal of 131458109 is 901854131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 92582884 + 38875225 = 9622^2 + 6235^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131458109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131458609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65729054 + 65729055.

It is an arithmetic number, because the mean of its divisors is an integer number (65729055).

Almost surely, 2^131458109 is an apocalyptic number.

It is an amenable number.

131458109 is a deficient number, since it is larger than the sum of its proper divisors (1).

131458109 is an equidigital number, since it uses as much as digits as its factorization.

131458109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 32.

The square root of 131458109 is about 11465.5182612911. The cubic root of 131458109 is about 508.4666349564.

The spelling of 131458109 in words is "one hundred thirty-one million, four hundred fifty-eight thousand, one hundred nine".