129652723 has 4 divisors (see below), whose sum is σ = 131214888. Its totient is φ = 128090560.

The previous prime is 129652717. The next prime is 129652729. The reversal of 129652723 is 327256921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 327256921 = 12113 ⋅27017.

It is an interprime number because it is at equal distance from previous prime (129652717) and next prime (129652729).

It is a cyclic number.

It is not a de Polignac number, because 129652723 - 2²⁵ = 96098291 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129652729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 780958 + ... + 781123.

It is an arithmetic number, because the mean of its divisors is an integer number (32803722).

Almost surely, 2^129652723 is an apocalyptic number.

129652723 is a deficient number, since it is larger than the sum of its proper divisors (1562165).

129652723 is an equidigital number, since it uses as much as digits as its factorization.

129652723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1562164.

The product of its digits is 45360, while the sum is 37.

The square root of 129652723 is about 11386.5149628848. The cubic root of 129652723 is about 506.1282137978.

The spelling of 129652723 in words is "one hundred twenty-nine million, six hundred fifty-two thousand, seven hundred twenty-three".