546989921 has 2 divisors, whose sum is σ = 546989922. Its totient is φ = 546989920.

The previous prime is 546989857. The next prime is 546989929. The reversal of 546989921 is 129989645.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 452200225 + 94789696 = 21265^2 + 9736^2 .

It is a cyclic number.

It is not a de Polignac number, because 546989921 - 2⁶ = 546989857 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (546989929) 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 as a sum of consecutive naturals, namely, 273494960 + 273494961.

It is an arithmetic number, because the mean of its divisors is an integer number (273494961).

Almost surely, 2^546989921 is an apocalyptic number.

It is an amenable number.

546989921 is a deficient number, since it is larger than the sum of its proper divisors (1).

546989921 is an equidigital number, since it uses as much as digits as its factorization.

546989921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1399680, while the sum is 53.

The square root of 546989921 is about 23387.8156526000. The cubic root of 546989921 is about 817.8238557007.

The spelling of 546989921 in words is "five hundred forty-six million, nine hundred eighty-nine thousand, nine hundred twenty-one".