131509019 has 2 divisors, whose sum is σ = 131509020. Its totient is φ = 131509018.

The previous prime is 131509003. The next prime is 131509057. The reversal of 131509019 is 910905131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 131509019 - 2⁴ = 131509003 is a prime.

It is a super-2 number, since 2×131509019² = 34589244156684722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 131508982 and 131509000.

It is not a weakly prime, because it can be changed into another prime (131509069) 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, 65754509 + 65754510.

It is an arithmetic number, because the mean of its divisors is an integer number (65754510).

Almost surely, 2^131509019 is an apocalyptic number.

131509019 is a deficient number, since it is larger than the sum of its proper divisors (1).

131509019 is an equidigital number, since it uses as much as digits as its factorization.

131509019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1215, while the sum is 29.

The square root of 131509019 is about 11467.7381815247. The cubic root of 131509019 is about 508.5322647241.

The spelling of 131509019 in words is "one hundred thirty-one million, five hundred nine thousand, nineteen".