387422173 has 4 divisors (see below), whose sum is σ = 387483228. Its totient is φ = 387361120.

The previous prime is 387422117. The next prime is 387422177. The reversal of 387422173 is 371224783.

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 190384804 + 197037369 = 13798^2 + 14037^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-387422173 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 (387422177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19738 + ... + 34123.

It is an arithmetic number, because the mean of its divisors is an integer number (96870807).

Almost surely, 2^387422173 is an apocalyptic number.

It is an amenable number.

387422173 is a deficient number, since it is larger than the sum of its proper divisors (61055).

387422173 is an equidigital number, since it uses as much as digits as its factorization.

387422173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61054.

The product of its digits is 56448, while the sum is 37.

The square root of 387422173 is about 19683.0427779853. The cubic root of 387422173 is about 729.0010562462.

The spelling of 387422173 in words is "three hundred eighty-seven million, four hundred twenty-two thousand, one hundred seventy-three".