490974851 has 4 divisors (see below), whose sum is σ = 491023632. Its totient is φ = 490926072.

The previous prime is 490974833. The next prime is 490974857. The reversal of 490974851 is 158479094.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 158479094 = 2 ⋅79239547.

It is a cyclic number.

It is not a de Polignac number, because 490974851 - 2¹⁴ = 490958467 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 490974796 and 490974805.

It is not an unprimeable number, because it can be changed into a prime (490974857) 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, 3095 + ... + 31488.

It is an arithmetic number, because the mean of its divisors is an integer number (122755908).

Almost surely, 2^490974851 is an apocalyptic number.

490974851 is a deficient number, since it is larger than the sum of its proper divisors (48781).

490974851 is a wasteful number, since it uses less digits than its factorization.

490974851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48780.

The product of its (nonzero) digits is 362880, while the sum is 47.

The square root of 490974851 is about 22157.9523196526. The cubic root of 490974851 is about 788.8959908689.

The spelling of 490974851 in words is "four hundred ninety million, nine hundred seventy-four thousand, eight hundred fifty-one".