384867622129 has 3 divisors (see below), whose sum is σ = 384868242507. Its totient is φ = 384867001752.

The previous prime is 384867622127. The next prime is 384867622151. The reversal of 384867622129 is 921226768483.

It is a happy number.

The square root of 384867622129 is 620377.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 273210063025 + 111657559104 = 522695^2 + 334152^2 .

It is not a de Polignac number, because 384867622129 - 2¹ = 384867622127 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (384867622127) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 310189 + ... + 930565.

It is an arithmetic number, because the mean of its divisors is an integer number (128289414169).

Almost surely, 2^384867622129 is an apocalyptic number.

384867622129 is the 620377-th square number.

384867622129 is the 310189-th centered octagonal number.

It is an amenable number.

384867622129 is a deficient number, since it is larger than the sum of its proper divisors (620378).

384867622129 is an frugal number, since it uses more digits than its factorization.

384867622129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1240754 (or 620377 counting only the distinct ones).

The product of its digits is 13934592, while the sum is 58.

The spelling of 384867622129 in words is "three hundred eighty-four billion, eight hundred sixty-seven million, six hundred twenty-two thousand, one hundred twenty-nine".