Search a number
-
+
389161983 = 3722383101
BaseRepresentation
bin10111001100100…
…010001111111111
31000010021110212210
4113030202033333
51244111140413
6102341031503
712433552020
oct2714421777
91003243783
10389161983
1118a743181
12aa3b5593
1362818482
1439982c47
15242723c3
hex173223ff

389161983 has 16 divisors (see below), whose sum is σ = 595675136. Its totient is φ = 221378400.

The previous prime is 389161957. The next prime is 389161999.

389161983 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 389161983 - 25 = 389161951 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (389161183) 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, 36868 + ... + 46233.

It is an arithmetic number, because the mean of its divisors is an integer number (37229696).

Almost surely, 2389161983 is an apocalyptic number.

389161983 is a deficient number, since it is larger than the sum of its proper divisors (206513153).

389161983 is a wasteful number, since it uses less digits than its factorization.

389161983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83334.

The product of its digits is 279936, while the sum is 48.

The square root of 389161983 is about 19727.1889279745. The cubic root of 389161983 is about 730.0906767952.

The spelling of 389161983 in words is "three hundred eighty-nine million, one hundred sixty-one thousand, nine hundred eighty-three".

Divisors: 1 3 7 21 223 669 1561 4683 83101 249303 581707 1745121 18531523 55594569 129720661 389161983