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11881099 = 19631991
BaseRepresentation
bin101101010100…
…101010001011
3211100121210201
4231110222023
511020143344
61102353031
7202662526
oct55245213
924317721
1011881099
11678549a
123b8b777
1325ccb49
141813bbd
15109a4d4
hexb54a8b

11881099 has 8 divisors (see below), whose sum is σ = 12538880. Its totient is φ = 11226600.

The previous prime is 11881057. The next prime is 11881117. The reversal of 11881099 is 99018811.

It is a happy number.

11881099 is digitally balanced in base 2, 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 a cyclic number.

It is not a de Polignac number, because 11881099 - 29 = 11880587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11881049) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11494 + ... + 12484.

It is an arithmetic number, because the mean of its divisors is an integer number (1567360).

Almost surely, 211881099 is an apocalyptic number.

11881099 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

11881099 is a deficient number, since it is larger than the sum of its proper divisors (657781).

11881099 is an equidigital number, since it uses as much as digits as its factorization.

11881099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1641.

The product of its (nonzero) digits is 5184, while the sum is 37.

The square root of 11881099 is about 3446.8970103558. The cubic root of 11881099 is about 228.1841835310.

The spelling of 11881099 in words is "eleven million, eight hundred eighty-one thousand, ninety-nine".

Divisors: 1 19 631 991 11989 18829 625321 11881099