549949999 has 2 divisors, whose sum is σ = 549950000. Its totient is φ = 549949998.

The previous prime is 549949991. The next prime is 549950021. The reversal of 549949999 is 999949945.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 549949999 - 2³ = 549949991 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (549949991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 274974999 + 274975000.

It is an arithmetic number, because the mean of its divisors is an integer number (274975000).

Almost surely, 2^549949999 is an apocalyptic number.

549949999 is a deficient number, since it is larger than the sum of its proper divisors (1).

549949999 is an equidigital number, since it uses as much as digits as its factorization.

549949999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 42515280, while the sum is 67.

The square root of 549949999 is about 23451.0127499859. The cubic root of 549949999 is about 819.2964414344.

The spelling of 549949999 in words is "five hundred forty-nine million, nine hundred forty-nine thousand, nine hundred ninety-nine".