990969550 has 12 divisors (see below), whose sum is σ = 1843203456. Its totient is φ = 396387800.

The previous prime is 990969547. The next prime is 990969569. The reversal of 990969550 is 55969099.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9909646 + ... + 9909745.

It is an arithmetic number, because the mean of its divisors is an integer number (153600288).

Almost surely, 2^990969550 is an apocalyptic number.

990969550 is a deficient number, since it is larger than the sum of its proper divisors (852233906).

990969550 is a wasteful number, since it uses less digits than its factorization.

990969550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19819403 (or 19819398 counting only the distinct ones).

The product of its (nonzero) digits is 984150, while the sum is 52.

The square root of 990969550 is about 31479.6688356152. The cubic root of 990969550 is about 996.9807432632.

The spelling of 990969550 in words is "nine hundred ninety million, nine hundred sixty-nine thousand, five hundred fifty".