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1389073 = 7198439
BaseRepresentation
bin101010011001000010001
32121120110011
411103020101
5323422243
645434521
714543530
oct5231021
92546404
101389073
118696a4
1256ba41
1339834a
14282317
151c689d
hex153211

1389073 has 4 divisors (see below), whose sum is σ = 1587520. Its totient is φ = 1190628.

The previous prime is 1389007. The next prime is 1389083. The reversal of 1389073 is 3709831.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1389073 - 213 = 1380881 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 (1389083) 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, 99213 + ... + 99226.

It is an arithmetic number, because the mean of its divisors is an integer number (396880).

21389073 is an apocalyptic number.

It is an amenable number.

1389073 is a deficient number, since it is larger than the sum of its proper divisors (198447).

1389073 is an equidigital number, since it uses as much as digits as its factorization.

1389073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198446.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 1389073 is about 1178.5894111182. The cubic root of 1389073 is about 111.5770881310.

The spelling of 1389073 in words is "one million, three hundred eighty-nine thousand, seventy-three".

Divisors: 1 7 198439 1389073