490838251 has 4 divisors (see below), whose sum is σ = 490917592. Its totient is φ = 490758912.

The previous prime is 490838237. The next prime is 490838261. The reversal of 490838251 is 152838094.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 490838251 - 2⁵ = 490838219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (490838261) 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, 29526 + ... + 43051.

It is an arithmetic number, because the mean of its divisors is an integer number (122729398).

Almost surely, 2^490838251 is an apocalyptic number.

490838251 is a deficient number, since it is larger than the sum of its proper divisors (79341).

490838251 is an equidigital number, since it uses as much as digits as its factorization.

490838251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79340.

The product of its (nonzero) digits is 69120, while the sum is 40.

The square root of 490838251 is about 22154.8696904315. The cubic root of 490838251 is about 788.8228213453.

The spelling of 490838251 in words is "four hundred ninety million, eight hundred thirty-eight thousand, two hundred fifty-one".