549152399 has 4 divisors (see below), whose sum is σ = 551106960. Its totient is φ = 547197840.

The previous prime is 549152389. The next prime is 549152407. The reversal of 549152399 is 993251945.

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 549152399 - 2⁸ = 549152143 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (549152389) 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, 976859 + ... + 977420.

It is an arithmetic number, because the mean of its divisors is an integer number (137776740).

Almost surely, 2^549152399 is an apocalyptic number.

549152399 is a deficient number, since it is larger than the sum of its proper divisors (1954561).

549152399 is a wasteful number, since it uses less digits than its factorization.

549152399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1954560.

The product of its digits is 437400, while the sum is 47.

The square root of 549152399 is about 23434.0009174703. Note that the first 3 decimals coincide. The cubic root of 549152399 is about 818.9001708581.

The spelling of 549152399 in words is "five hundred forty-nine million, one hundred fifty-two thousand, three hundred ninety-nine".