Base | Representation |
---|---|
bin | 111010111100111… |
… | …001000101011101 |
3 | 2112221001111011202 |
4 | 322330321011131 |
5 | 4011143302424 |
6 | 242050325245 |
7 | 33336465266 |
oct | 7274710535 |
9 | 2487044152 |
10 | 989040989 |
11 | 468319152 |
12 | 237289825 |
13 | 129ba0c71 |
14 | 954d796d |
15 | 5bc692ae |
hex | 3af3915d |
989040989 has 2 divisors, whose sum is σ = 989040990. Its totient is φ = 989040988.
The previous prime is 989040973. The next prime is 989041021.
989040989 is nontrivially palindromic in base 10.
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 545222500 + 443818489 = 23350^2 + 21067^2 .
It is a palprime.
It is a cyclic number.
It is not a de Polignac number, because 989040989 - 24 = 989040973 is a prime.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (989040919) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494520494 + 494520495.
It is an arithmetic number, because the mean of its divisors is an integer number (494520495).
Almost surely, 2989040989 is an apocalyptic number.
It is an amenable number.
989040989 is a deficient number, since it is larger than the sum of its proper divisors (1).
989040989 is an equidigital number, since it uses as much as digits as its factorization.
989040989 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 1679616, while the sum is 56.
The square root of 989040989 is about 31449.0220674666. The cubic root of 989040989 is about 996.3335700537. Note that the first 3 decimals are identical.
The spelling of 989040989 in words is "nine hundred eighty-nine million, forty thousand, nine hundred eighty-nine".
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