495877139 has 2 divisors, whose sum is σ = 495877140. Its totient is φ = 495877138.

The previous prime is 495877091. The next prime is 495877141. The reversal of 495877139 is 931778594.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-495877139 is a prime.

Together with 495877141, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (495877159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 247938569 + 247938570.

It is an arithmetic number, because the mean of its divisors is an integer number (247938570).

Almost surely, 2^495877139 is an apocalyptic number.

495877139 is a deficient number, since it is larger than the sum of its proper divisors (1).

495877139 is an equidigital number, since it uses as much as digits as its factorization.

495877139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1905120, while the sum is 53.

The square root of 495877139 is about 22268.2989696115. The cubic root of 495877139 is about 791.5129575978.

The spelling of 495877139 in words is "four hundred ninety-five million, eight hundred seventy-seven thousand, one hundred thirty-nine".