265717139 has 2 divisors, whose sum is σ = 265717140. Its totient is φ = 265717138.

The previous prime is 265717129. The next prime is 265717141. The reversal of 265717139 is 931717562.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-265717139 is a prime.

Together with 265717141, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 265717096 and 265717105.

It is not a weakly prime, because it can be changed into another prime (265717129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132858569 + 132858570.

It is an arithmetic number, because the mean of its divisors is an integer number (132858570).

Almost surely, 2^265717139 is an apocalyptic number.

265717139 is a deficient number, since it is larger than the sum of its proper divisors (1).

265717139 is an equidigital number, since it uses as much as digits as its factorization.

265717139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 79380, while the sum is 41.

The square root of 265717139 is about 16300.8324634051. The cubic root of 265717139 is about 642.8947154454.

The spelling of 265717139 in words is "two hundred sixty-five million, seven hundred seventeen thousand, one hundred thirty-nine".