Base | Representation |
---|---|
bin | 1010011011000… |
… | …01100011101111 |
3 | 20002111222100021 |
4 | 11031201203233 |
5 | 134340301112 |
6 | 12401543011 |
7 | 2111104030 |
oct | 515414357 |
9 | 202458307 |
10 | 87431407 |
11 | 45397568 |
12 | 25344a67 |
13 | 15162a7b |
14 | b87ca87 |
15 | 7a20907 |
hex | 53618ef |
87431407 has 32 divisors (see below), whose sum is σ = 109683200. Its totient is φ = 68024448.
The previous prime is 87431401. The next prime is 87431413. The reversal of 87431407 is 70413478.
It is an interprime number because it is at equal distance from previous prime (87431401) and next prime (87431413).
It is a 12-Lehmer number, since φ(87431407) divides (87431407-1)12.
It is a cyclic number.
It is not a de Polignac number, because 87431407 - 211 = 87429359 is a prime.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (87431401) by changing a digit.
It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 536308 + ... + 536470.
It is an arithmetic number, because the mean of its divisors is an integer number (3427600).
Almost surely, 287431407 is an apocalyptic number.
87431407 is the 5399-th hex number.
87431407 is a deficient number, since it is larger than the sum of its proper divisors (22251793).
87431407 is a wasteful number, since it uses less digits than its factorization.
87431407 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 335.
The product of its (nonzero) digits is 18816, while the sum is 34.
The square root of 87431407 is about 9350.4762980289. The cubic root of 87431407 is about 443.8359629270.
The spelling of 87431407 in words is "eighty-seven million, four hundred thirty-one thousand, four hundred seven".
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