Base | Representation |
---|---|
bin | 11001010111000… |
… | …111111000010011 |
3 | 1002122122020021111 |
4 | 121113013320103 |
5 | 1332411220422 |
6 | 110115434151 |
7 | 13354423264 |
oct | 3127077023 |
9 | 1078566244 |
10 | 425491987 |
11 | 1a91a7478 |
12 | ba5b5957 |
13 | 6a1c870b |
14 | 4071c96b |
15 | 2754ba77 |
hex | 195c7e13 |
425491987 has 4 divisors (see below), whose sum is σ = 434545056. Its totient is φ = 416438920.
The previous prime is 425491981. The next prime is 425491991. The reversal of 425491987 is 789194524.
It is a semiprime because it is the product of two primes.
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-425491987 is a prime.
It is a Duffinian number.
It is a self number, because there is not a number n which added to its sum of digits gives 425491987.
It is not an unprimeable number, because it can be changed into a prime (425491981) 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, 4526464 + ... + 4526557.
It is an arithmetic number, because the mean of its divisors is an integer number (108636264).
Almost surely, 2425491987 is an apocalyptic number.
425491987 is a gapful number since it is divisible by the number (47) formed by its first and last digit.
425491987 is a deficient number, since it is larger than the sum of its proper divisors (9053069).
425491987 is an equidigital number, since it uses as much as digits as its factorization.
425491987 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 9053068.
The product of its digits is 725760, while the sum is 49.
The square root of 425491987 is about 20627.4571142446. The cubic root of 425491987 is about 752.1373031649.
The spelling of 425491987 in words is "four hundred twenty-five million, four hundred ninety-one thousand, nine hundred eighty-seven".
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