550943491 has 4 divisors (see below), whose sum is σ = 629649712. Its totient is φ = 472237272.

The previous prime is 550943489. The next prime is 550943509. The reversal of 550943491 is 194349055.

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 550943491 - 2¹ = 550943489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (550943411) 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, 39353100 + ... + 39353113.

It is an arithmetic number, because the mean of its divisors is an integer number (157412428).

Almost surely, 2^550943491 is an apocalyptic number.

550943491 is a deficient number, since it is larger than the sum of its proper divisors (78706221).

550943491 is an equidigital number, since it uses as much as digits as its factorization.

550943491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78706220.

The product of its (nonzero) digits is 97200, while the sum is 40.

The square root of 550943491 is about 23472.1854755794. The cubic root of 550943491 is about 819.7895012926.

It can be divided in two parts, 55094 and 3491, that added together give a palindrome (58585).

The spelling of 550943491 in words is "five hundred fifty million, nine hundred forty-three thousand, four hundred ninety-one".