129719 has 2 divisors, whose sum is σ = 129720. Its totient is φ = 129718.

The previous prime is 129707. The next prime is 129733. The reversal of 129719 is 917921.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^{k}-129719 is a prime.

It is a super-2 number, since 2×129719^{2} = 33654037922, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to *n*+sod(*n*) for *n* = 129691 and 129700.

It is a congruent number.

It is an inconsummate number, since it does not exist a number *n* which divided by its sum of digits gives 129719.

It is not a weakly prime, because it can be changed into another prime (129749) 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, 64859 + 64860.

It is an arithmetic number, because the mean of its divisors is an integer number (64860).

2^{129719} is an apocalyptic number.

129719 is a deficient number, since it is larger than the sum of its proper divisors (1).

129719 is an equidigital number, since it uses as much as digits as its factorization.

129719 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1134, while the sum is 29.

The square root of 129719 is about 360.1652398553. The cubic root of 129719 is about 50.6214441439.

It can be divided in two parts, 129 and 719, that added together give a palindrome (848).

The spelling of 129719 in words is "one hundred twenty-nine thousand, seven hundred nineteen".

• e-mail: info -at- numbersaplenty.com • Privacy notice • done in 0.064 sec. • engine limits •