1384406893 has 4 divisors (see below), whose sum is σ = 1384482780. Its totient is φ = 1384331008.

The previous prime is 1384406879. The next prime is 1384406923. The reversal of 1384406893 is 3986044831.

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 2 ways, for example, as 243453609 + 1140953284 = 15603^2 + 33778^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1384406893 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 (1384406813) 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, 7821 + ... + 53197.

It is an arithmetic number, because the mean of its divisors is an integer number (346120695).

Almost surely, 2^1384406893 is an apocalyptic number.

It is an amenable number.

1384406893 is a deficient number, since it is larger than the sum of its proper divisors (75887).

1384406893 is an equidigital number, since it uses as much as digits as its factorization.

1384406893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75886.

The product of its (nonzero) digits is 497664, while the sum is 46.

The square root of 1384406893 is about 37207.6187493906. The cubic root of 1384406893 is about 1114.5201318737.

The spelling of 1384406893 in words is "one billion, three hundred eighty-four million, four hundred six thousand, eight hundred ninety-three".