545998889 has 2 divisors, whose sum is σ = 545998890. Its totient is φ = 545998888.

The previous prime is 545998883. The next prime is 545998897. The reversal of 545998889 is 988899545.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 400000000 + 145998889 = 20000^2 + 12083^2 .

It is a cyclic number.

It is not a de Polignac number, because 545998889 - 2¹² = 545994793 is a prime.

It is a super-2 number, since 2×545998889² = 596229573578468642, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (545998883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 272999444 + 272999445.

It is an arithmetic number, because the mean of its divisors is an integer number (272999445).

Almost surely, 2^545998889 is an apocalyptic number.

It is an amenable number.

545998889 is a deficient number, since it is larger than the sum of its proper divisors (1).

545998889 is an equidigital number, since it uses as much as digits as its factorization.

545998889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 37324800, while the sum is 65.

The square root of 545998889 is about 23366.6191178784. The cubic root of 545998889 is about 817.3296481885.

The spelling of 545998889 in words is "five hundred forty-five million, nine hundred ninety-eight thousand, eight hundred eighty-nine".