549021403 has 4 divisors (see below), whose sum is σ = 627453040. Its totient is φ = 470589768.

The previous prime is 549021401. The next prime is 549021413. The reversal of 549021403 is 304120945.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 549021403 - 2¹ = 549021401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (549021401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39215808 + ... + 39215821.

It is an arithmetic number, because the mean of its divisors is an integer number (156863260).

Almost surely, 2^549021403 is an apocalyptic number.

549021403 is a deficient number, since it is larger than the sum of its proper divisors (78431637).

549021403 is an equidigital number, since it uses as much as digits as its factorization.

549021403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78431636.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 549021403 is about 23431.2057521588. The cubic root of 549021403 is about 818.8350516078.

The spelling of 549021403 in words is "five hundred forty-nine million, twenty-one thousand, four hundred three".