384685261 has 4 divisors (see below), whose sum is σ = 397950300. Its totient is φ = 371420224.

The previous prime is 384685201. The next prime is 384685277. The reversal of 384685261 is 162586483.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 84529636 + 300155625 = 9194^2 + 17325^2 .

It is a cyclic number.

It is not a de Polignac number, because 384685261 - 2⁹ = 384684749 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (384685201) 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, 6632476 + ... + 6632533.

It is an arithmetic number, because the mean of its divisors is an integer number (99487575).

Almost surely, 2^384685261 is an apocalyptic number.

It is an amenable number.

384685261 is a deficient number, since it is larger than the sum of its proper divisors (13265039).

384685261 is a wasteful number, since it uses less digits than its factorization.

384685261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13265038.

The product of its digits is 276480, while the sum is 43.

The square root of 384685261 is about 19613.3949381539. The cubic root of 384685261 is about 727.2803419615.

The spelling of 384685261 in words is "three hundred eighty-four million, six hundred eighty-five thousand, two hundred sixty-one".