129623945 has 8 divisors (see below), whose sum is σ = 169689600. Its totient is φ = 94271920.

The previous prime is 129623899. The next prime is 129623951. The reversal of 129623945 is 549326921.

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

It is not a de Polignac number, because 129623945 - 2¹⁴ = 129607561 is a prime.

It is a super-3 number, since 3×129623945³ (a number of 25 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1178345 + ... + 1178454.

It is an arithmetic number, because the mean of its divisors is an integer number (21211200).

Almost surely, 2^129623945 is an apocalyptic number.

It is an amenable number.

129623945 is a deficient number, since it is larger than the sum of its proper divisors (40065655).

129623945 is a wasteful number, since it uses less digits than its factorization.

129623945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2356815.

The product of its digits is 116640, while the sum is 41.

The square root of 129623945 is about 11385.2512049581. The cubic root of 129623945 is about 506.0907639210.

The spelling of 129623945 in words is "one hundred twenty-nine million, six hundred twenty-three thousand, nine hundred forty-five".