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11990507 = 43278849
BaseRepresentation
bin101101101111…
…010111101011
3211120011212212
4231233113223
511032144012
61104555335
7203626514
oct55572753
924504785
1011990507
11684a711
124022b4b
13263a899
141841a0b
1510bcb22
hexb6f5eb

11990507 has 4 divisors (see below), whose sum is σ = 12269400. Its totient is φ = 11711616.

The previous prime is 11990483. The next prime is 11990509. The reversal of 11990507 is 70509911.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11990507 - 218 = 11728363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11990509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 139382 + ... + 139467.

It is an arithmetic number, because the mean of its divisors is an integer number (3067350).

Almost surely, 211990507 is an apocalyptic number.

11990507 is a deficient number, since it is larger than the sum of its proper divisors (278893).

11990507 is an equidigital number, since it uses as much as digits as its factorization.

11990507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278892.

The product of its (nonzero) digits is 2835, while the sum is 32.

The square root of 11990507 is about 3462.7311475193. The cubic root of 11990507 is about 228.8824616269.

The spelling of 11990507 in words is "eleven million, nine hundred ninety thousand, five hundred seven".

Divisors: 1 43 278849 11990507