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9029381 = 29330817
BaseRepresentation
bin100010011100…
…011100000101
3121222201222112
4202130130011
54302420011
6521310405
7136514504
oct42343405
917881875
109029381
1151079a9
123035405
131b41b3a
1412b083b
15bd558b
hex89c705

9029381 has 4 divisors (see below), whose sum is σ = 9060492. Its totient is φ = 8998272.

The previous prime is 9029357. The next prime is 9029393. The reversal of 9029381 is 1839209.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1839209 = 2963421.

It can be written as a sum of positive squares in 2 ways, for example, as 4368100 + 4661281 = 2090^2 + 2159^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-9029381 is a prime.

It is a super-2 number, since 2×90293812 = 163059442486322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9029341) 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, 15116 + ... + 15701.

It is an arithmetic number, because the mean of its divisors is an integer number (2265123).

Almost surely, 29029381 is an apocalyptic number.

It is an amenable number.

9029381 is a deficient number, since it is larger than the sum of its proper divisors (31111).

9029381 is a wasteful number, since it uses less digits than its factorization.

9029381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31110.

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 9029381 is about 3004.8928433473. The cubic root of 9029381 is about 208.2344880785.

The spelling of 9029381 in words is "nine million, twenty-nine thousand, three hundred eighty-one".

Divisors: 1 293 30817 9029381