490121239 has 2 divisors, whose sum is σ = 490121240. Its totient is φ = 490121238.

The previous prime is 490121231. The next prime is 490121243. The reversal of 490121239 is 932121094.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 490121239 - 2³ = 490121231 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 490121239.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (490121231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245060619 + 245060620.

It is an arithmetic number, because the mean of its divisors is an integer number (245060620).

Almost surely, 2^490121239 is an apocalyptic number.

490121239 is a deficient number, since it is larger than the sum of its proper divisors (1).

490121239 is an equidigital number, since it uses as much as digits as its factorization.

490121239 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 490121239 is about 22138.6819616706. The cubic root of 490121239 is about 788.4385324566.

The spelling of 490121239 in words is "four hundred ninety million, one hundred twenty-one thousand, two hundred thirty-nine".