890498781 has 6 divisors (see below), whose sum is σ = 1286276030. Its totient is φ = 593665848.

The previous prime is 890498773. The next prime is 890498849. The reversal of 890498781 is 187894098.

890498781 is a `hidden beast` number, since 89 + 0 + 498 + 78 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 847333881 + 43164900 = 29109^2 + 6570^2 .

It is not a de Polignac number, because 890498781 - 2³ = 890498773 is a prime.

It is a super-2 number, since 2×890498781² = 1585976157924971922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (890498701) 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 in 5 ways as a sum of consecutive naturals, for example, 49472146 + ... + 49472163.

Almost surely, 2^890498781 is an apocalyptic number.

It is an amenable number.

890498781 is a deficient number, since it is larger than the sum of its proper divisors (395777249).

890498781 is a wasteful number, since it uses less digits than its factorization.

890498781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98944315 (or 98944312 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 54.

The square root of 890498781 is about 29841.2261979966. The cubic root of 890498781 is about 962.0798300086.

The spelling of 890498781 in words is "eight hundred ninety million, four hundred ninety-eight thousand, seven hundred eighty-one".