Search a number
-
+
619989 = 31973149
BaseRepresentation
bin10010111010111010101
31011111110120
42113113111
5124314424
621142153
75161356
oct2272725
91144416
10619989
11393897
1225a959
13189276
14121d2d
15c3a79
hex975d5

619989 has 16 divisors (see below), whose sum is σ = 888000. Its totient is φ = 383616.

The previous prime is 619987. The next prime is 619999. The reversal of 619989 is 989916.

It is not a de Polignac number, because 619989 - 21 = 619987 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 619989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (619981) 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, 4087 + ... + 4235.

It is an arithmetic number, because the mean of its divisors is an integer number (55500).

2619989 is an apocalyptic number.

It is an amenable number.

619989 is a deficient number, since it is larger than the sum of its proper divisors (268011).

619989 is a wasteful number, since it uses less digits than its factorization.

619989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244.

The product of its digits is 34992, while the sum is 42.

The square root of 619989 is about 787.3938023632. The cubic root of 619989 is about 85.2696855438.

The spelling of 619989 in words is "six hundred nineteen thousand, nine hundred eighty-nine".

Divisors: 1 3 19 57 73 149 219 447 1387 2831 4161 8493 10877 32631 206663 619989