490520851 has 2 divisors, whose sum is σ = 490520852. Its totient is φ = 490520850.

The previous prime is 490520837. The next prime is 490520879. The reversal of 490520851 is 158025094.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 490520851 - 2⁹ = 490520339 is a prime.

It is a super-2 number, since 2×490520851² = 481221410531528402, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (490520551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245260425 + 245260426.

It is an arithmetic number, because the mean of its divisors is an integer number (245260426).

Almost surely, 2^490520851 is an apocalyptic number.

490520851 is a deficient number, since it is larger than the sum of its proper divisors (1).

490520851 is an equidigital number, since it uses as much as digits as its factorization.

490520851 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14400, while the sum is 34.

The square root of 490520851 is about 22147.7053213194. The cubic root of 490520851 is about 788.6527542203.

The spelling of 490520851 in words is "four hundred ninety million, five hundred twenty thousand, eight hundred fifty-one".