490487191 has 4 divisors (see below), whose sum is σ = 490535352. Its totient is φ = 490439032.

The previous prime is 490487189. The next prime is 490487201. The reversal of 490487191 is 191784094.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 191784094 = 2 ⋅95892047.

It is a cyclic number.

It is not a de Polignac number, because 490487191 - 2¹ = 490487189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (490487131) 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, 2140 + ... + 31393.

It is an arithmetic number, because the mean of its divisors is an integer number (122633838).

Almost surely, 2^490487191 is an apocalyptic number.

490487191 is a deficient number, since it is larger than the sum of its proper divisors (48161).

490487191 is a wasteful number, since it uses less digits than its factorization.

490487191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48160.

The product of its (nonzero) digits is 72576, while the sum is 43.

The square root of 490487191 is about 22146.9454101463. The cubic root of 490487191 is about 788.6347144442.

The spelling of 490487191 in words is "four hundred ninety million, four hundred eighty-seven thousand, one hundred ninety-one".