490721171 has 2 divisors, whose sum is σ = 490721172. Its totient is φ = 490721170.

The previous prime is 490721141. The next prime is 490721183. The reversal of 490721171 is 171127094.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 490721171 - 2⁶ = 490721107 is a prime.

It is a super-2 number, since 2×490721171² = 481614535335222482, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (490721141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245360585 + 245360586.

It is an arithmetic number, because the mean of its divisors is an integer number (245360586).

Almost surely, 2^490721171 is an apocalyptic number.

490721171 is a deficient number, since it is larger than the sum of its proper divisors (1).

490721171 is an equidigital number, since it uses as much as digits as its factorization.

490721171 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3528, while the sum is 32.

The square root of 490721171 is about 22152.2272243673. The cubic root of 490721171 is about 788.7600968667.

The spelling of 490721171 in words is "four hundred ninety million, seven hundred twenty-one thousand, one hundred seventy-one".