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10115839 = 97104287
BaseRepresentation
bin100110100101…
…101011111111
3201000221022201
4212211223333
510042201324
61000452331
7151661146
oct46455377
921027281
1010115839
11578a1a8
12347a0a7
132132506
1414b475d
15d4c444
hex9a5aff

10115839 has 4 divisors (see below), whose sum is σ = 10220224. Its totient is φ = 10011456.

The previous prime is 10115821. The next prime is 10115843. The reversal of 10115839 is 93851101.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93851101 = 175520653.

It is a cyclic number.

It is not a de Polignac number, because 10115839 - 27 = 10115711 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 (10115849) 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, 52047 + ... + 52240.

It is an arithmetic number, because the mean of its divisors is an integer number (2555056).

Almost surely, 210115839 is an apocalyptic number.

10115839 is a deficient number, since it is larger than the sum of its proper divisors (104385).

10115839 is an equidigital number, since it uses as much as digits as its factorization.

10115839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104384.

The product of its (nonzero) digits is 1080, while the sum is 28.

The square root of 10115839 is about 3180.5406773063. The cubic root of 10115839 is about 216.2721691997.

The spelling of 10115839 in words is "ten million, one hundred fifteen thousand, eight hundred thirty-nine".

Divisors: 1 97 104287 10115839