265938139 has 4 divisors (see below), whose sum is σ = 266030856. Its totient is φ = 265845424.

The previous prime is 265938137. The next prime is 265938143. The reversal of 265938139 is 931839562.

It is a happy number.

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 265938139 - 2¹ = 265938137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (265938137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41914 + ... + 47839.

It is an arithmetic number, because the mean of its divisors is an integer number (66507714).

Almost surely, 2^265938139 is an apocalyptic number.

265938139 is a deficient number, since it is larger than the sum of its proper divisors (92717).

265938139 is an equidigital number, since it uses as much as digits as its factorization.

265938139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92716.

The product of its digits is 349920, while the sum is 46.

The square root of 265938139 is about 16307.6098493924. The cubic root of 265938139 is about 643.0729003642.

The spelling of 265938139 in words is "two hundred sixty-five million, nine hundred thirty-eight thousand, one hundred thirty-nine".