495544991 has 2 divisors, whose sum is σ = 495544992. Its totient is φ = 495544990.

The previous prime is 495544961. The next prime is 495544993. The reversal of 495544991 is 199445594.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 495544991 - 2¹⁸ = 495282847 is a prime.

Together with 495544993, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (495544993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 247772495 + 247772496.

It is an arithmetic number, because the mean of its divisors is an integer number (247772496).

Almost surely, 2^495544991 is an apocalyptic number.

495544991 is a deficient number, since it is larger than the sum of its proper divisors (1).

495544991 is an equidigital number, since it uses as much as digits as its factorization.

495544991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1166400, while the sum is 50.

The square root of 495544991 is about 22260.8398538779. The cubic root of 495544991 is about 791.3361946153.

It can be divided in two parts, 49554 and 4991, that added together give a palindrome (54545).

The spelling of 495544991 in words is "four hundred ninety-five million, five hundred forty-four thousand, nine hundred ninety-one".