555121399 has 8 divisors (see below), whose sum is σ = 662008320. Its totient is φ = 455130456.

The previous prime is 555121379. The next prime is 555121409. The reversal of 555121399 is 993121555.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 555121399 - 2⁵ = 555121367 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 (555121319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1723819 + ... + 1724140.

It is an arithmetic number, because the mean of its divisors is an integer number (82751040).

Almost surely, 2^555121399 is an apocalyptic number.

555121399 is a deficient number, since it is larger than the sum of its proper divisors (106886921).

555121399 is a wasteful number, since it uses less digits than its factorization.

555121399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3447989.

The product of its digits is 60750, while the sum is 40.

The square root of 555121399 is about 23561.0143881795. The cubic root of 555121399 is about 821.8564912080.

The spelling of 555121399 in words is "five hundred fifty-five million, one hundred twenty-one thousand, three hundred ninety-nine".