131787777019 has 2 divisors, whose sum is σ = 131787777020. Its totient is φ = 131787777018.

The previous prime is 131787776977. The next prime is 131787777071. The reversal of 131787777019 is 910777787131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 131787777019 - 2²⁷ = 131653559291 is a prime.

It is a super-2 number, since 2×131787777019² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (131787277019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65893888509 + 65893888510.

It is an arithmetic number, because the mean of its divisors is an integer number (65893888510).

Almost surely, 2^131787777019 is an apocalyptic number.

131787777019 is a deficient number, since it is larger than the sum of its proper divisors (1).

131787777019 is an equidigital number, since it uses as much as digits as its factorization.

131787777019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3630312, while the sum is 58.

The spelling of 131787777019 in words is "one hundred thirty-one billion, seven hundred eighty-seven million, seven hundred seventy-seven thousand, nineteen".