498972781 has 2 divisors, whose sum is σ = 498972782. Its totient is φ = 498972780.

The previous prime is 498972767. The next prime is 498972809. The reversal of 498972781 is 187279894.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 496844100 + 2128681 = 22290^2 + 1459^2 .

It is a cyclic number.

It is not a de Polignac number, because 498972781 - 2⁷ = 498972653 is a prime.

It is a super-2 number, since 2×498972781² = 497947672357747922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (498972701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 249486390 + 249486391.

It is an arithmetic number, because the mean of its divisors is an integer number (249486391).

Almost surely, 2^498972781 is an apocalyptic number.

It is an amenable number.

498972781 is a deficient number, since it is larger than the sum of its proper divisors (1).

498972781 is an equidigital number, since it uses as much as digits as its factorization.

498972781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2032128, while the sum is 55.

The square root of 498972781 is about 22337.6986504877. The cubic root of 498972781 is about 793.1566171645.

The spelling of 498972781 in words is "four hundred ninety-eight million, nine hundred seventy-two thousand, seven hundred eighty-one".