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131383207 = 499263293
BaseRepresentation
bin1111101010010…
…11111110100111
3100011012221212201
413311023332213
5232113230312
621011555331
73153511264
oct765137647
9304187781
10131383207
116818716a
1237bbbb47
13212b1257
141364026b
15b803557
hex7d4bfa7

131383207 has 4 divisors (see below), whose sum is σ = 131647000. Its totient is φ = 131119416.

The previous prime is 131383201. The next prime is 131383211. The reversal of 131383207 is 702383131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 702383131 = 2330538397.

It is a cyclic number.

It is not a de Polignac number, because 131383207 - 219 = 130858919 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 (131383201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 131148 + ... + 132145.

It is an arithmetic number, because the mean of its divisors is an integer number (32911750).

Almost surely, 2131383207 is an apocalyptic number.

131383207 is a deficient number, since it is larger than the sum of its proper divisors (263793).

131383207 is an equidigital number, since it uses as much as digits as its factorization.

131383207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263792.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 131383207 is about 11462.2513931601. The cubic root of 131383207 is about 508.3700454957.

The spelling of 131383207 in words is "one hundred thirty-one million, three hundred eighty-three thousand, two hundred seven".

Divisors: 1 499 263293 131383207