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12238455079 = 91113434089
BaseRepresentation
bin10110110010111100…
…00000000100100111
31011120220210221020001
423121132000010213
5200031021030304
65342224322131
7612165103024
oct133136000447
934526727201
1012238455079
11521031a494
122456773347
1312006943c6
1484157054b
154b9673da4
hex2d9780127

12238455079 has 4 divisors (see below), whose sum is σ = 12251890080. Its totient is φ = 12225020080.

The previous prime is 12238455029. The next prime is 12238455083. The reversal of 12238455079 is 97055483221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97055483221 = 208346594087.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-12238455079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12238455029) 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, 6716134 + ... + 6717955.

It is an arithmetic number, because the mean of its divisors is an integer number (3062972520).

Almost surely, 212238455079 is an apocalyptic number.

12238455079 is a deficient number, since it is larger than the sum of its proper divisors (13435001).

12238455079 is an equidigital number, since it uses as much as digits as its factorization.

12238455079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13435000.

The product of its (nonzero) digits is 604800, while the sum is 46.

The spelling of 12238455079 in words is "twelve billion, two hundred thirty-eight million, four hundred fifty-five thousand, seventy-nine".

Divisors: 1 911 13434089 12238455079