129623041 has 4 divisors (see below), whose sum is σ = 129719232. Its totient is φ = 129526852.

The previous prime is 129623033. The next prime is 129623047. The reversal of 129623041 is 140326921.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 140326921 = 7 ⋅20046703.

It is a cyclic number.

It is not a de Polignac number, because 129623041 - 2³ = 129623033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129623047) 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 in 3 ways as a sum of consecutive naturals, for example, 46045 + ... + 48778.

It is an arithmetic number, because the mean of its divisors is an integer number (32429808).

Almost surely, 2^129623041 is an apocalyptic number.

It is an amenable number.

129623041 is a deficient number, since it is larger than the sum of its proper divisors (96191).

129623041 is an equidigital number, since it uses as much as digits as its factorization.

129623041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96190.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 129623041 is about 11385.2115044034. The cubic root of 129623041 is about 506.0895874225.

Adding to 129623041 its reverse (140326921), we get a palindrome (269949962).

The spelling of 129623041 in words is "one hundred twenty-nine million, six hundred twenty-three thousand, forty-one".