495039689 has 2 divisors, whose sum is σ = 495039690. Its totient is φ = 495039688.

The previous prime is 495039659. The next prime is 495039691. The reversal of 495039689 is 986930594.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 482022025 + 13017664 = 21955^2 + 3608^2 .

It is a cyclic number.

It is not a de Polignac number, because 495039689 - 2²⁸ = 226604233 is a prime.

Together with 495039691, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 495039689.

It is not a weakly prime, because it can be changed into another prime (495039659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 247519844 + 247519845.

It is an arithmetic number, because the mean of its divisors is an integer number (247519845).

Almost surely, 2^495039689 is an apocalyptic number.

It is an amenable number.

495039689 is a deficient number, since it is larger than the sum of its proper divisors (1).

495039689 is an equidigital number, since it uses as much as digits as its factorization.

495039689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2099520, while the sum is 53.

The square root of 495039689 is about 22249.4873873534. The cubic root of 495039689 is about 791.0671307507.

The spelling of 495039689 in words is "four hundred ninety-five million, thirty-nine thousand, six hundred eighty-nine".