495778013 has 2 divisors, whose sum is σ = 495778014. Its totient is φ = 495778012.

The previous prime is 495777977. The next prime is 495778051. The reversal of 495778013 is 310877594.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 440454169 + 55323844 = 20987^2 + 7438^2 .

It is a cyclic number.

It is not a de Polignac number, because 495778013 - 2⁸ = 495777757 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (495778813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 247889006 + 247889007.

It is an arithmetic number, because the mean of its divisors is an integer number (247889007).

Almost surely, 2^495778013 is an apocalyptic number.

It is an amenable number.

495778013 is a deficient number, since it is larger than the sum of its proper divisors (1).

495778013 is an equidigital number, since it uses as much as digits as its factorization.

495778013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 211680, while the sum is 44.

The square root of 495778013 is about 22266.0731382972. The cubic root of 495778013 is about 791.4602128512.

The spelling of 495778013 in words is "four hundred ninety-five million, seven hundred seventy-eight thousand, thirteen".