546821989 has 16 divisors (see below), whose sum is σ = 646266880. Its totient is φ = 452764080.

The previous prime is 546821981. The next prime is 546821993. The reversal of 546821989 is 989128645.

It is a cyclic number.

It is not a de Polignac number, because 546821989 - 2³ = 546821981 is a prime.

It is a super-2 number, since 2×546821989² = 598028575307832242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (546821981) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 137572 + ... + 141490.

It is an arithmetic number, because the mean of its divisors is an integer number (40391680).

Almost surely, 2^546821989 is an apocalyptic number.

It is an amenable number.

546821989 is a deficient number, since it is larger than the sum of its proper divisors (99444891).

546821989 is a wasteful number, since it uses less digits than its factorization.

546821989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4600.

The product of its digits is 1244160, while the sum is 52.

The square root of 546821989 is about 23384.2252170133. The cubic root of 546821989 is about 817.7401534558.

The spelling of 546821989 in words is "five hundred forty-six million, eight hundred twenty-one thousand, nine hundred eighty-nine".