490206991 has 8 divisors (see below), whose sum is σ = 494878160. Its totient is φ = 485552448.

The previous prime is 490206953. The next prime is 490207001. The reversal of 490206991 is 199602094.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-490206991 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 (490206191) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59665 + ... + 67381.

It is an arithmetic number, because the mean of its divisors is an integer number (61859770).

Almost surely, 2^490206991 is an apocalyptic number.

490206991 is a deficient number, since it is larger than the sum of its proper divisors (4671169).

490206991 is a wasteful number, since it uses less digits than its factorization.

490206991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8313.

The product of its (nonzero) digits is 34992, while the sum is 40.

The square root of 490206991 is about 22140.6185776279. The cubic root of 490206991 is about 788.4845117184.

The spelling of 490206991 in words is "four hundred ninety million, two hundred six thousand, nine hundred ninety-one".