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384352921 = 2913253549
BaseRepresentation
bin10110111010001…
…100001010011001
3222210020011002101
4112322030022121
51241343243141
6102050003401
712344642311
oct2672141231
9883204071
10384352921
11187a59047
12a8876561
1361823584
1439090441
1523b22531
hex16e8c299

384352921 has 4 divisors (see below), whose sum is σ = 397606500. Its totient is φ = 371099344.

The previous prime is 384352879. The next prime is 384352961. The reversal of 384352921 is 129253483.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 129253483 = 592190737.

It can be written as a sum of positive squares in 2 ways, for example, as 100902025 + 283450896 = 10045^2 + 16836^2 .

It is a cyclic number.

It is not a de Polignac number, because 384352921 - 211 = 384350873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (384352961) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6626746 + ... + 6626803.

It is an arithmetic number, because the mean of its divisors is an integer number (99401625).

Almost surely, 2384352921 is an apocalyptic number.

It is an amenable number.

384352921 is a deficient number, since it is larger than the sum of its proper divisors (13253579).

384352921 is a wasteful number, since it uses less digits than its factorization.

384352921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13253578.

The product of its digits is 51840, while the sum is 37.

The square root of 384352921 is about 19604.9208363615. The cubic root of 384352921 is about 727.0708425674.

The spelling of 384352921 in words is "three hundred eighty-four million, three hundred fifty-two thousand, nine hundred twenty-one".

Divisors: 1 29 13253549 384352921