495837781 has 2 divisors, whose sum is σ = 495837782. Its totient is φ = 495837780.

The previous prime is 495837757. The next prime is 495837787. The reversal of 495837781 is 187738594.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 357399025 + 138438756 = 18905^2 + 11766^2 .

It is a cyclic number.

It is not a de Polignac number, because 495837781 - 2¹³ = 495829589 is a prime.

It is a super-2 number, since 2×495837781² = 491710210134007922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (495837787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 247918890 + 247918891.

It is an arithmetic number, because the mean of its divisors is an integer number (247918891).

Almost surely, 2^495837781 is an apocalyptic number.

It is an amenable number.

495837781 is a deficient number, since it is larger than the sum of its proper divisors (1).

495837781 is an equidigital number, since it uses as much as digits as its factorization.

495837781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1693440, while the sum is 52.

The square root of 495837781 is about 22267.4152294333. The cubic root of 495837781 is about 791.4920161261.

The spelling of 495837781 in words is "four hundred ninety-five million, eight hundred thirty-seven thousand, seven hundred eighty-one".