550447979 has 2 divisors, whose sum is σ = 550447980. Its totient is φ = 550447978.

The previous prime is 550447951. The next prime is 550448023. The reversal of 550447979 is 979744055.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 550447979 - 2²⁴ = 533670763 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (550447279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275223989 + 275223990.

It is an arithmetic number, because the mean of its divisors is an integer number (275223990).

Almost surely, 2^550447979 is an apocalyptic number.

550447979 is a deficient number, since it is larger than the sum of its proper divisors (1).

550447979 is an equidigital number, since it uses as much as digits as its factorization.

550447979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1587600, while the sum is 50.

The square root of 550447979 is about 23461.6277994516. The cubic root of 550447979 is about 819.5436579441.

The spelling of 550447979 in words is "five hundred fifty million, four hundred forty-seven thousand, nine hundred seventy-nine".