490722191 has 2 divisors, whose sum is σ = 490722192. Its totient is φ = 490722190.

The previous prime is 490722163. The next prime is 490722203. The reversal of 490722191 is 191227094.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-490722191 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (490722151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245361095 + 245361096.

It is an arithmetic number, because the mean of its divisors is an integer number (245361096).

Almost surely, 2^490722191 is an apocalyptic number.

490722191 is a deficient number, since it is larger than the sum of its proper divisors (1).

490722191 is an equidigital number, since it uses as much as digits as its factorization.

490722191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 35.

The square root of 490722191 is about 22152.2502468711. The cubic root of 490722191 is about 788.7606433649.

The spelling of 490722191 in words is "four hundred ninety million, seven hundred twenty-two thousand, one hundred ninety-one".