495491957 has 2 divisors, whose sum is σ = 495491958. Its totient is φ = 495491956.

The previous prime is 495491849. The next prime is 495491977. The reversal of 495491957 is 759194594.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 373301041 + 122190916 = 19321^2 + 11054^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-495491957 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 495491899 and 495491908.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (495491977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 247745978 + 247745979.

It is an arithmetic number, because the mean of its divisors is an integer number (247745979).

Almost surely, 2^495491957 is an apocalyptic number.

It is an amenable number.

495491957 is a deficient number, since it is larger than the sum of its proper divisors (1).

495491957 is an equidigital number, since it uses as much as digits as its factorization.

495491957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2041200, while the sum is 53.

The square root of 495491957 is about 22259.6486270561. The cubic root of 495491957 is about 791.3079635958.

The spelling of 495491957 in words is "four hundred ninety-five million, four hundred ninety-one thousand, nine hundred fifty-seven".