384771421 has 8 divisors (see below), whose sum is σ = 408819960. Its totient is φ = 362133184.

The previous prime is 384771403. The next prime is 384771427. The reversal of 384771421 is 124177483.

It can be written as a sum of positive squares in 4 ways, for example, as 72012196 + 312759225 = 8486^2 + 17685^2 .

It is not a de Polignac number, because 384771421 - 2⁹ = 384770909 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 (384771427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34246 + ... + 44071.

It is an arithmetic number, because the mean of its divisors is an integer number (51102495).

Almost surely, 2^384771421 is an apocalyptic number.

It is an amenable number.

384771421 is a deficient number, since it is larger than the sum of its proper divisors (24048539).

384771421 is an frugal number, since it uses more digits than its factorization.

384771421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78368 (or 78334 counting only the distinct ones).

The product of its digits is 37632, while the sum is 37.

The square root of 384771421 is about 19615.5912732704. The cubic root of 384771421 is about 727.3346355212.

The spelling of 384771421 in words is "three hundred eighty-four million, seven hundred seventy-one thousand, four hundred twenty-one".