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131107739 = 718729677
BaseRepresentation
bin1111101000010…
…00101110011011
3100010200222000012
413310020232123
5232030421424
621002032135
73151253210
oct764105633
9303628005
10131107739
1168009204
1237aa864b
1321215a59
14135abb07
15b79bb0e
hex7d08b9b

131107739 has 4 divisors (see below), whose sum is σ = 149837424. Its totient is φ = 112378056.

The previous prime is 131107703. The next prime is 131107747. The reversal of 131107739 is 937701131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 937701131 = 1583592357.

It is not a de Polignac number, because 131107739 - 224 = 114330523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131107799) 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, 9364832 + ... + 9364845.

It is an arithmetic number, because the mean of its divisors is an integer number (37459356).

Almost surely, 2131107739 is an apocalyptic number.

131107739 is a deficient number, since it is larger than the sum of its proper divisors (18729685).

131107739 is an equidigital number, since it uses as much as digits as its factorization.

131107739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18729684.

The product of its (nonzero) digits is 3969, while the sum is 32.

The square root of 131107739 is about 11450.2287750071. The cubic root of 131107739 is about 508.0145011567.

The spelling of 131107739 in words is "one hundred thirty-one million, one hundred seven thousand, seven hundred thirty-nine".

Divisors: 1 7 18729677 131107739