550139791 has 8 divisors (see below), whose sum is σ = 565703264. Its totient is φ = 534612960.

The previous prime is 550139761. The next prime is 550139797. The reversal of 550139791 is 197931055.

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 550139791 - 2⁹ = 550139279 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 (550139797) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22846 + ... + 40276.

It is an arithmetic number, because the mean of its divisors is an integer number (70712908).

Almost surely, 2^550139791 is an apocalyptic number.

550139791 is a deficient number, since it is larger than the sum of its proper divisors (15563473).

550139791 is a wasteful number, since it uses less digits than its factorization.

550139791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18321.

The product of its (nonzero) digits is 42525, while the sum is 40.

The square root of 550139791 is about 23455.0589638995. The cubic root of 550139791 is about 819.3906791083.

The spelling of 550139791 in words is "five hundred fifty million, one hundred thirty-nine thousand, seven hundred ninety-one".