490247987 has 4 divisors (see below), whose sum is σ = 507153120. Its totient is φ = 473342856.

The previous prime is 490247983. The next prime is 490248001. The reversal of 490247987 is 789742094.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 490247987 - 2² = 490247983 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (490247983) 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, 8452523 + ... + 8452580.

It is an arithmetic number, because the mean of its divisors is an integer number (126788280).

Almost surely, 2^490247987 is an apocalyptic number.

490247987 is a deficient number, since it is larger than the sum of its proper divisors (16905133).

490247987 is a wasteful number, since it uses less digits than its factorization.

490247987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16905132.

The product of its (nonzero) digits is 1016064, while the sum is 50.

The square root of 490247987 is about 22141.5443679975. The cubic root of 490247987 is about 788.5064914199.

The spelling of 490247987 in words is "four hundred ninety million, two hundred forty-seven thousand, nine hundred eighty-seven".