235712820139 has 4 divisors (see below), whose sum is σ = 235714301856. Its totient is φ = 235711338424.

The previous prime is 235712820137. The next prime is 235712820229. The reversal of 235712820139 is 931028217532.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 235712820139 - 2¹ = 235712820137 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 235712820095 and 235712820104.

It is not an unprimeable number, because it can be changed into a prime (235712820137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 468979 + ... + 831484.

It is an arithmetic number, because the mean of its divisors is an integer number (58928575464).

Almost surely, 2^235712820139 is an apocalyptic number.

235712820139 is a deficient number, since it is larger than the sum of its proper divisors (1481717).

235712820139 is a wasteful number, since it uses less digits than its factorization.

235712820139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1481716.

The product of its (nonzero) digits is 181440, while the sum is 43.

The spelling of 235712820139 in words is "two hundred thirty-five billion, seven hundred twelve million, eight hundred twenty thousand, one hundred thirty-nine".