987920906 has 16 divisors (see below), whose sum is σ = 1695335616. Its totient is φ = 422955456.

The previous prime is 987920897. The next prime is 987920917. The reversal of 987920906 is 609029789.

987920906 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22436 + ... + 49791.

It is an arithmetic number, because the mean of its divisors is an integer number (105958476).

Almost surely, 2^987920906 is an apocalyptic number.

987920906 is a deficient number, since it is larger than the sum of its proper divisors (707414710).

987920906 is a wasteful number, since it uses less digits than its factorization.

987920906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73213.

The product of its (nonzero) digits is 489888, while the sum is 50.

The square root of 987920906 is about 31431.2091081460. The cubic root of 987920906 is about 995.9573140472.

The spelling of 987920906 in words is "nine hundred eighty-seven million, nine hundred twenty thousand, nine hundred six".