182947921 has 16 divisors (see below), whose sum is σ = 204518160. Its totient is φ = 162489600.

The previous prime is 182947913. The next prime is 182947937. The reversal of 182947921 is 129749281.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 47458321 + 135489600 = 6889^2 + 11640^2 .

It is not a de Polignac number, because 182947921 - 2³ = 182947913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (182947321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 139971 + ... + 141271.

It is an arithmetic number, because the mean of its divisors is an integer number (12782385).

Almost surely, 2^182947921 is an apocalyptic number.

It is an amenable number.

182947921 is a deficient number, since it is larger than the sum of its proper divisors (21570239).

182947921 is a wasteful number, since it uses less digits than its factorization.

182947921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1716.

The product of its digits is 72576, while the sum is 43.

The square root of 182947921 is about 13525.8242262718. The cubic root of 182947921 is about 567.6872751612.

The spelling of 182947921 in words is "one hundred eighty-two million, nine hundred forty-seven thousand, nine hundred twenty-one".