495169681 has 2 divisors, whose sum is σ = 495169682. Its totient is φ = 495169680.

The previous prime is 495169673. The next prime is 495169687. The reversal of 495169681 is 186961594.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 473454081 + 21715600 = 21759^2 + 4660^2 .

It is a cyclic number.

It is not a de Polignac number, because 495169681 - 2³ = 495169673 is a prime.

It is a super-2 number, since 2×495169681² = 490386025963283522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (495169687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 247584840 + 247584841.

It is an arithmetic number, because the mean of its divisors is an integer number (247584841).

Almost surely, 2^495169681 is an apocalyptic number.

It is an amenable number.

495169681 is a deficient number, since it is larger than the sum of its proper divisors (1).

495169681 is an equidigital number, since it uses as much as digits as its factorization.

495169681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 466560, while the sum is 49.

The square root of 495169681 is about 22252.4084314485. The cubic root of 495169681 is about 791.1363665454.

The spelling of 495169681 in words is "four hundred ninety-five million, one hundred sixty-nine thousand, six hundred eighty-one".