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381927 = 37131399
BaseRepresentation
bin1011101001111100111
3201101220110
41131033213
544210202
612104103
73150330
oct1351747
9641813
10381927
11240a47
12165033
13104ac0
149d287
157826c
hex5d3e7

381927 has 16 divisors (see below), whose sum is σ = 627200. Its totient is φ = 201312.

The previous prime is 381917. The next prime is 381937. The reversal of 381927 is 729183.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (381917) and next prime (381937).

It is not a de Polignac number, because 381927 - 24 = 381911 is a prime.

381927 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 381894 and 381903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is an upside-down number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 427 + ... + 972.

It is an arithmetic number, because the mean of its divisors is an integer number (39200).

2381927 is an apocalyptic number.

381927 is a deficient number, since it is larger than the sum of its proper divisors (245273).

381927 is a wasteful number, since it uses less digits than its factorization.

381927 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1422.

The product of its digits is 3024, while the sum is 30.

The square root of 381927 is about 618.0024271797. The cubic root of 381927 is about 72.5537928163.

The spelling of 381927 in words is "three hundred eighty-one thousand, nine hundred twenty-seven".

Divisors: 1 3 7 13 21 39 91 273 1399 4197 9793 18187 29379 54561 127309 381927