275409139 has 2 divisors, whose sum is σ = 275409140. Its totient is φ = 275409138.

The previous prime is 275409133. The next prime is 275409149. The reversal of 275409139 is 931904572.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 275409139 - 2⁷ = 275409011 is a prime.

It is not a weakly prime, because it can be changed into another prime (275409133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 137704569 + 137704570.

It is an arithmetic number, because the mean of its divisors is an integer number (137704570).

Almost surely, 2^275409139 is an apocalyptic number.

275409139 is a deficient number, since it is larger than the sum of its proper divisors (1).

275409139 is an equidigital number, since it uses as much as digits as its factorization.

275409139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 68040, while the sum is 40.

The square root of 275409139 is about 16595.4553718782. The cubic root of 275409139 is about 650.6180622186.

The spelling of 275409139 in words is "two hundred seventy-five million, four hundred nine thousand, one hundred thirty-nine".