550447961 has 4 divisors (see below), whose sum is σ = 629083392. Its totient is φ = 471812532.

The previous prime is 550447951. The next prime is 550447979. The reversal of 550447961 is 169744055.

550447961 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 550447961 - 2²⁶ = 483339097 is a prime.

It is not an unprimeable number, because it can be changed into a prime (550447921) 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, 39317705 + ... + 39317718.

It is an arithmetic number, because the mean of its divisors is an integer number (157270848).

Almost surely, 2^550447961 is an apocalyptic number.

It is an amenable number.

550447961 is a deficient number, since it is larger than the sum of its proper divisors (78635431).

550447961 is an equidigital number, since it uses as much as digits as its factorization.

550447961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78635430.

The product of its (nonzero) digits is 151200, while the sum is 41.

The square root of 550447961 is about 23461.6274158465. The cubic root of 550447961 is about 819.5436490109.

The spelling of 550447961 in words is "five hundred fifty million, four hundred forty-seven thousand, nine hundred sixty-one".