129723343 has 2 divisors, whose sum is σ = 129723344. Its totient is φ = 129723342.

The previous prime is 129723329. The next prime is 129723353. The reversal of 129723343 is 343327921.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129723343 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 129723299 and 129723308.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129723353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64861671 + 64861672.

It is an arithmetic number, because the mean of its divisors is an integer number (64861672).

Almost surely, 2^129723343 is an apocalyptic number.

129723343 is a deficient number, since it is larger than the sum of its proper divisors (1).

129723343 is an equidigital number, since it uses as much as digits as its factorization.

129723343 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27216, while the sum is 34.

The square root of 129723343 is about 11389.6155773582. The cubic root of 129723343 is about 506.2200907392.

It can be divided in two parts, 1297 and 23343, that multiplied together give a triangular number (30275871 = T₇₇₈₁).

The spelling of 129723343 in words is "one hundred twenty-nine million, seven hundred twenty-three thousand, three hundred forty-three".