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1389147 = 31924371
BaseRepresentation
bin101010011001001011011
32121120112220
411103021123
5323423042
645435123
714543664
oct5231133
92546486
101389147
11869761
1256baa3
133983a6
1428236b
151c68ec
hex15325b

1389147 has 8 divisors (see below), whose sum is σ = 1949760. Its totient is φ = 877320.

The previous prime is 1389139. The next prime is 1389149. The reversal of 1389147 is 7419831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1389147 - 23 = 1389139 is a prime.

It is a super-3 number, since 3×13891473 = 8042033368826638569, which contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (1389149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12129 + ... + 12242.

It is an arithmetic number, because the mean of its divisors is an integer number (243720).

21389147 is an apocalyptic number.

1389147 is a deficient number, since it is larger than the sum of its proper divisors (560613).

1389147 is a wasteful number, since it uses less digits than its factorization.

1389147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24393.

The product of its digits is 6048, while the sum is 33.

The square root of 1389147 is about 1178.6208041605. The cubic root of 1389147 is about 111.5790694422.

The spelling of 1389147 in words is "one million, three hundred eighty-nine thousand, one hundred forty-seven".

Divisors: 1 3 19 57 24371 73113 463049 1389147