498392861 has 4 divisors (see below), whose sum is σ = 500922972. Its totient is φ = 495862752.

The previous prime is 498392813. The next prime is 498392863. The reversal of 498392861 is 168293894.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 168293894 = 2 ⋅84146947.

It can be written as a sum of positive squares in 2 ways, for example, as 470239225 + 28153636 = 21685^2 + 5306^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-498392861 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (498392863) 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 3 ways as a sum of consecutive naturals, for example, 1264760 + ... + 1265153.

It is an arithmetic number, because the mean of its divisors is an integer number (125230743).

Almost surely, 2^498392861 is an apocalyptic number.

It is an amenable number.

498392861 is a deficient number, since it is larger than the sum of its proper divisors (2530111).

498392861 is a wasteful number, since it uses less digits than its factorization.

498392861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2530110.

The product of its digits is 746496, while the sum is 50.

The square root of 498392861 is about 22324.7141303086. The cubic root of 498392861 is about 792.8492218424.

The spelling of 498392861 in words is "four hundred ninety-eight million, three hundred ninety-two thousand, eight hundred sixty-one".