Base | Representation |
---|---|
bin | 1001001001111… |
… | …11101101000101 |
3 | 12100112012101000 |
4 | 10210333231011 |
5 | 124130310411 |
6 | 11342123513 |
7 | 1621564026 |
oct | 444775505 |
9 | 170465330 |
10 | 76806981 |
11 | 3a3a0249 |
12 | 21880599 |
13 | 12bb2c24 |
14 | a2b4c4d |
15 | 6b22956 |
hex | 493fb45 |
76806981 has 16 divisors (see below), whose sum is σ = 116565120. Its totient is φ = 49955040.
The previous prime is 76806953. The next prime is 76807009. The reversal of 76806981 is 18960867.
It is a happy number.
It is an interprime number because it is at equal distance from previous prime (76806953) and next prime (76807009).
It is not a de Polignac number, because 76806981 - 29 = 76806469 is a prime.
It is a super-2 number, since 2×768069812 = 11798624660668722, which contains 22 as substring.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (76806481) by changing a digit.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33585 + ... + 35798.
It is an arithmetic number, because the mean of its divisors is an integer number (7285320).
Almost surely, 276806981 is an apocalyptic number.
It is an amenable number.
76806981 is a deficient number, since it is larger than the sum of its proper divisors (39758139).
76806981 is a wasteful number, since it uses less digits than its factorization.
76806981 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 69433 (or 69427 counting only the distinct ones).
The product of its (nonzero) digits is 145152, while the sum is 45.
The square root of 76806981 is about 8763.9592080292. The cubic root of 76806981 is about 425.0763064833.
The spelling of 76806981 in words is "seventy-six million, eight hundred six thousand, nine hundred eighty-one".
• e-mail: info -at- numbersaplenty.com • Privacy notice • done in 0.069 sec. • engine limits •