Search a number
-
+
8069161 = 109181409
BaseRepresentation
bin11110110010000000101001
3120011221210211
4132302000221
54031203121
6444541121
7125405152
oct36620051
916157724
108069161
114611531
1228517a1
131896a69
141100929
15a95ce1
hex7b2029

8069161 has 8 divisors (see below), whose sum is σ = 8208200. Its totient is φ = 7931520.

The previous prime is 8069153. The next prime is 8069189. The reversal of 8069161 is 1619608.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1210000 + 6859161 = 1100^2 + 2619^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 8069161 - 23 = 8069153 is a prime.

It is a super-2 number, since 2×80691612 = 130222718487842, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8069261) 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, 19525 + ... + 19933.

It is an arithmetic number, because the mean of its divisors is an integer number (1026025).

Almost surely, 28069161 is an apocalyptic number.

It is an amenable number.

8069161 is a deficient number, since it is larger than the sum of its proper divisors (139039).

8069161 is a wasteful number, since it uses less digits than its factorization.

8069161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 699.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 8069161 is about 2840.6268674361. The cubic root of 8069161 is about 200.5746887492.

The spelling of 8069161 in words is "eight million, sixty-nine thousand, one hundred sixty-one".

Divisors: 1 109 181 409 19729 44581 74029 8069161