129379623 has 8 divisors (see below), whose sum is σ = 180006528. Its totient is φ = 82502904.

The previous prime is 129379619. The next prime is 129379637. The reversal of 129379623 is 326973921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 129379623 - 2² = 129379619 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129379603) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 937465 + ... + 937602.

It is an arithmetic number, because the mean of its divisors is an integer number (22500816).

Almost surely, 2^129379623 is an apocalyptic number.

129379623 is a deficient number, since it is larger than the sum of its proper divisors (50626905).

129379623 is a wasteful number, since it uses less digits than its factorization.

129379623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1875093.

The product of its digits is 122472, while the sum is 42.

The square root of 129379623 is about 11374.5163853238. The cubic root of 129379623 is about 505.7725951448.

The spelling of 129379623 in words is "one hundred twenty-nine million, three hundred seventy-nine thousand, six hundred twenty-three".