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990929 = 4124169
BaseRepresentation
bin11110001111011010001
31212100022002
43301323101
5223202204
633123345
711265002
oct3617321
91770262
10990929
11617555
123b9555
13289064
141bb1a9
1514891e
hexf1ed1

990929 has 4 divisors (see below), whose sum is σ = 1015140. Its totient is φ = 966720.

The previous prime is 990923. The next prime is 990953. The reversal of 990929 is 929099.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 929099 = 1019199.

It can be written as a sum of positive squares in 2 ways, for example, as 528529 + 462400 = 727^2 + 680^2 .

It is a cyclic number.

It is not a de Polignac number, because 990929 - 28 = 990673 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 990892 and 990901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (990923) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12044 + ... + 12125.

It is an arithmetic number, because the mean of its divisors is an integer number (253785).

2990929 is an apocalyptic number.

It is an amenable number.

990929 is a deficient number, since it is larger than the sum of its proper divisors (24211).

990929 is a wasteful number, since it uses less digits than its factorization.

990929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24210.

The product of its (nonzero) digits is 13122, while the sum is 38.

The square root of 990929 is about 995.4541677044. The cubic root of 990929 is about 99.6967144419.

The spelling of 990929 in words is "nine hundred ninety thousand, nine hundred twenty-nine".

Divisors: 1 41 24169 990929