498371891 has 4 divisors (see below), whose sum is σ = 506541984. Its totient is φ = 490201800.

The previous prime is 498371869. The next prime is 498371911. The reversal of 498371891 is 198173894.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 198173894 = 2 ⋅99086947.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-498371891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (498371821) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4084955 + ... + 4085076.

It is an arithmetic number, because the mean of its divisors is an integer number (126635496).

Almost surely, 2^498371891 is an apocalyptic number.

498371891 is a deficient number, since it is larger than the sum of its proper divisors (8170093).

498371891 is an equidigital number, since it uses as much as digits as its factorization.

498371891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8170092.

The product of its digits is 435456, while the sum is 50.

The square root of 498371891 is about 22324.2444664987. The cubic root of 498371891 is about 792.8381019123.

It can be divided in two parts, 4983 and 71891, that multiplied together give a palindrome (358232853).

The spelling of 498371891 in words is "four hundred ninety-eight million, three hundred seventy-one thousand, eight hundred ninety-one".