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131083087 = 152386069
BaseRepresentation
bin1111101000000…
…10101101001111
3100010122201012011
413310002231033
5232024124322
621001322051
73151121302
oct764025517
9303581164
10131083087
1167aa1733
1237a96327
1321207775
14135a2b39
15b794677
hex7d02b4f

131083087 has 4 divisors (see below), whose sum is σ = 131170680. Its totient is φ = 130995496.

The previous prime is 131083061. The next prime is 131083157. The reversal of 131083087 is 780380131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 780380131 = 1301599831.

It is a cyclic number.

It is not a de Polignac number, because 131083087 - 211 = 131081039 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 (131083487) 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, 41512 + ... + 44557.

It is an arithmetic number, because the mean of its divisors is an integer number (32792670).

Almost surely, 2131083087 is an apocalyptic number.

131083087 is a deficient number, since it is larger than the sum of its proper divisors (87593).

131083087 is an equidigital number, since it uses as much as digits as its factorization.

131083087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87592.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 131083087 is about 11449.1522393582. The cubic root of 131083087 is about 507.9826587484.

The spelling of 131083087 in words is "one hundred thirty-one million, eighty-three thousand, eighty-seven".

Divisors: 1 1523 86069 131083087