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23013969 = 3111813853
BaseRepresentation
bin101011111001…
…0101001010001
31121022020020020
41113302221101
521342421334
62141134053
7366421056
oct127625121
947266206
1023013969
1111a99810
12785a329
1349ca244
1430b102d
152048e49
hex15f2a51

23013969 has 16 divisors (see below), whose sum is σ = 33668544. Its totient is φ = 13867200.

The previous prime is 23013967. The next prime is 23013983. The reversal of 23013969 is 96931032.

It is not a de Polignac number, because 23013969 - 21 = 23013967 is a prime.

It is a super-2 number, since 2×230139692 = 1059285538265922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (23013967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4047 + ... + 7899.

It is an arithmetic number, because the mean of its divisors is an integer number (2104284).

Almost surely, 223013969 is an apocalyptic number.

It is an amenable number.

23013969 is a deficient number, since it is larger than the sum of its proper divisors (10654575).

23013969 is a wasteful number, since it uses less digits than its factorization.

23013969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4048.

The product of its (nonzero) digits is 8748, while the sum is 33.

The square root of 23013969 is about 4797.2876711742. The cubic root of 23013969 is about 284.4442602142. Note that the first 3 decimals are identical.

The spelling of 23013969 in words is "twenty-three million, thirteen thousand, nine hundred sixty-nine".

Divisors: 1 3 11 33 181 543 1991 3853 5973 11559 42383 127149 697393 2092179 7671323 23013969