969990 has 64 divisors (see below), whose sum is σ = 2764800. Its totient is φ = 213120.

The previous prime is 969989. The next prime is 970027. The reversal of 969990 is 99969.

969990 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6436 + ... + 6584.

It is an arithmetic number, because the mean of its divisors is an integer number (43200).

2⁹⁶⁹⁹⁹⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 969990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1382400).

969990 is an abundant number, since it is smaller than the sum of its proper divisors (1794810).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

969990 is a wasteful number, since it uses less digits than its factorization.

969990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197.

The product of its (nonzero) digits is 39366, while the sum is 42.

The square root of 969990 is about 984.8807034357. The cubic root of 969990 is about 98.9894897525.

The spelling of 969990 in words is "nine hundred sixty-nine thousand, nine hundred ninety".