990655894 has 4 divisors (see below), whose sum is σ = 1485983844. Its totient is φ = 495327946.

The previous prime is 990655873. The next prime is 990655907. The reversal of 990655894 is 498556099.

It is a happy number.

990655894 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

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, 247663972 + ... + 247663975.

It is an arithmetic number, because the mean of its divisors is an integer number (371495961).

Almost surely, 2^990655894 is an apocalyptic number.

990655894 is a deficient number, since it is larger than the sum of its proper divisors (495327950).

990655894 is a wasteful number, since it uses less digits than its factorization.

990655894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 495327949.

The product of its (nonzero) digits is 3499200, while the sum is 55.

The square root of 990655894 is about 31474.6865592018. The cubic root of 990655894 is about 996.8755459541.

The spelling of 990655894 in words is "nine hundred ninety million, six hundred fifty-five thousand, eight hundred ninety-four".