Search a number
-
+
80681379 = 359455827
BaseRepresentation
bin1001100111100…
…01100110100011
312121211001001020
410303301212203
5131123301004
612001140523
71666531452
oct463614643
9177731036
1080681379
11415a7129
122302a743
131393b57c
14aa02b99
15713a8d9
hex4cf19a3

80681379 has 8 divisors (see below), whose sum is σ = 109398720. Its totient is φ = 52875816.

The previous prime is 80681351. The next prime is 80681387. The reversal of 80681379 is 97318608.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 80681379 - 29 = 80680867 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 80681379.

It is not an unprimeable number, because it can be changed into a prime (80681339) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 227737 + ... + 228090.

It is an arithmetic number, because the mean of its divisors is an integer number (13674840).

Almost surely, 280681379 is an apocalyptic number.

80681379 is a deficient number, since it is larger than the sum of its proper divisors (28717341).

80681379 is a wasteful number, since it uses less digits than its factorization.

80681379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 455889.

The product of its (nonzero) digits is 72576, while the sum is 42.

The square root of 80681379 is about 8982.2813917178. The cubic root of 80681379 is about 432.1068033682.

The spelling of 80681379 in words is "eighty million, six hundred eighty-one thousand, three hundred seventy-nine".

Divisors: 1 3 59 177 455827 1367481 26893793 80681379