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9990145 = 511181639
BaseRepresentation
bin100110000111…
…000000000001
3200210112220101
4212013000001
510024141040
6554042401
7150625534
oct46070001
920715811
109990145
115703820
123419401
1320ba239
141480a1b
15d2509a
hex987001

9990145 has 8 divisors (see below), whose sum is σ = 13078080. Its totient is φ = 7265520.

The previous prime is 9990137. The next prime is 9990163. The reversal of 9990145 is 5410999.

9990145 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 9990145 - 23 = 9990137 is a prime.

9990145 is a lucky number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90765 + ... + 90874.

It is an arithmetic number, because the mean of its divisors is an integer number (1634760).

It is a Proth number, since it is equal to 2439 ⋅ 212 + 1 and 2439 < 212.

Almost surely, 29990145 is an apocalyptic number.

It is an amenable number.

9990145 is a deficient number, since it is larger than the sum of its proper divisors (3087935).

9990145 is a wasteful number, since it uses less digits than its factorization.

9990145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181655.

The product of its (nonzero) digits is 14580, while the sum is 37.

The square root of 9990145 is about 3160.7190637575. The cubic root of 9990145 is about 215.3726725619.

The spelling of 9990145 in words is "nine million, nine hundred ninety thousand, one hundred forty-five".

Divisors: 1 5 11 55 181639 908195 1998029 9990145