Base | Representation |
---|---|
bin | 10010000000101011101101 |
3 | 22212212112021 |
4 | 102000223231 |
5 | 2202041024 |
6 | 245110141 |
7 | 55062661 |
oct | 22005355 |
9 | 8785467 |
10 | 4721389 |
11 | 2735282 |
12 | 16b8351 |
13 | c9402a |
14 | 8ac8a1 |
15 | 633de4 |
hex | 480aed |
4721389 has 4 divisors (see below), whose sum is σ = 4725756. Its totient is φ = 4717024.
The previous prime is 4721383. The next prime is 4721407. The reversal of 4721389 is 9831274.
It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 9831274 = 2 ⋅4915637.
It can be written as a sum of positive squares in 2 ways, for example, as 448900 + 4272489 = 670^2 + 2067^2 .
It is a cyclic number.
It is not a de Polignac number, because 4721389 - 27 = 4721261 is a prime.
It is a Duffinian number.
4721389 is a lucky number.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (4721383) 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, 777 + ... + 3169.
It is an arithmetic number, because the mean of its divisors is an integer number (1181439).
Almost surely, 24721389 is an apocalyptic number.
It is an amenable number.
4721389 is a deficient number, since it is larger than the sum of its proper divisors (4367).
4721389 is a wasteful number, since it uses less digits than its factorization.
4721389 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 4366.
The product of its digits is 12096, while the sum is 34.
The square root of 4721389 is about 2172.8757442615. The cubic root of 4721389 is about 167.7605834787.
The spelling of 4721389 in words is "four million, seven hundred twenty-one thousand, three hundred eighty-nine".
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