275785139 has 4 divisors (see below), whose sum is σ = 315183024. Its totient is φ = 236387256.

The previous prime is 275785127. The next prime is 275785163. The reversal of 275785139 is 931587572.

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

It is not a de Polignac number, because 275785139 - 2¹⁶ = 275719603 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 275785093 and 275785102.

It is not an unprimeable number, because it can be changed into a prime (275785039) 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, 19698932 + ... + 19698945.

It is an arithmetic number, because the mean of its divisors is an integer number (78795756).

Almost surely, 2^275785139 is an apocalyptic number.

275785139 is a deficient number, since it is larger than the sum of its proper divisors (39397885).

275785139 is an equidigital number, since it uses as much as digits as its factorization.

275785139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39397884.

The product of its digits is 529200, while the sum is 47.

The square root of 275785139 is about 16606.7799106269. The cubic root of 275785139 is about 650.9140111829.

The spelling of 275785139 in words is "two hundred seventy-five million, seven hundred eighty-five thousand, one hundred thirty-nine".