990487606 has 4 divisors (see below), whose sum is σ = 1485731412. Its totient is φ = 495243802.

The previous prime is 990487583. The next prime is 990487637. The reversal of 990487606 is 606784099.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 606784099 = 1987 ⋅305377.

It is a super-2 number, since 2×990487606² = 1962131395279222472, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 990487606.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 247621900 + ... + 247621903.

It is an arithmetic number, because the mean of its divisors is an integer number (371432853).

Almost surely, 2^990487606 is an apocalyptic number.

990487606 is a deficient number, since it is larger than the sum of its proper divisors (495243806).

990487606 is a wasteful number, since it uses less digits than its factorization.

990487606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 495243805.

The product of its (nonzero) digits is 653184, while the sum is 49.

The square root of 990487606 is about 31472.0130592245. The cubic root of 990487606 is about 996.8190945689.

The spelling of 990487606 in words is "nine hundred ninety million, four hundred eighty-seven thousand, six hundred six".