495321139 has 2 divisors, whose sum is σ = 495321140. Its totient is φ = 495321138.

The previous prime is 495321137. The next prime is 495321157. The reversal of 495321139 is 931123594.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 495321139 - 2¹ = 495321137 is a prime.

Together with 495321137, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 495321098 and 495321107.

It is not a weakly prime, because it can be changed into another prime (495321137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 247660569 + 247660570.

It is an arithmetic number, because the mean of its divisors is an integer number (247660570).

Almost surely, 2^495321139 is an apocalyptic number.

495321139 is a deficient number, since it is larger than the sum of its proper divisors (1).

495321139 is an equidigital number, since it uses as much as digits as its factorization.

495321139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 29160, while the sum is 37.

The square root of 495321139 is about 22255.8113534420. The cubic root of 495321139 is about 791.2170201891.

The spelling of 495321139 in words is "four hundred ninety-five million, three hundred twenty-one thousand, one hundred thirty-nine".