550617491 has 2 divisors, whose sum is σ = 550617492. Its totient is φ = 550617490.

The previous prime is 550617479. The next prime is 550617523. The reversal of 550617491 is 194716055.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 550617491 - 2²² = 546423187 is a prime.

It is not a weakly prime, because it can be changed into another prime (550617421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275308745 + 275308746.

It is an arithmetic number, because the mean of its divisors is an integer number (275308746).

Almost surely, 2^550617491 is an apocalyptic number.

550617491 is a deficient number, since it is larger than the sum of its proper divisors (1).

550617491 is an equidigital number, since it uses as much as digits as its factorization.

550617491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 37800, while the sum is 38.

The square root of 550617491 is about 23465.2400584354. The cubic root of 550617491 is about 819.6277762330.

The spelling of 550617491 in words is "five hundred fifty million, six hundred seventeen thousand, four hundred ninety-one".