203129749578239 has 8 divisors (see below), whose sum is σ = 221599462494720. Its totient is φ = 184660598669400.

The previous prime is 203129749578221. The next prime is 203129749578251. The reversal of 203129749578239 is 932875947921302.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-203129749578239 is a prime.

It is a super-2 number, since 2×203129749578239² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203129749578739) 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, 139745999 + ... + 141192080.

It is an arithmetic number, because the mean of its divisors is an integer number (27699932811840).

Almost surely, 2^{203129749578239} is an apocalyptic number.

203129749578239 is a deficient number, since it is larger than the sum of its proper divisors (18469712916481).

203129749578239 is a wasteful number, since it uses less digits than its factorization.

203129749578239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281003821.

The product of its (nonzero) digits is 411505920, while the sum is 71.

The spelling of 203129749578239 in words is "two hundred three trillion, one hundred twenty-nine billion, seven hundred forty-nine million, five hundred seventy-eight thousand, two hundred thirty-nine".