919420549 has 2 divisors, whose sum is σ = 919420550. Its totient is φ = 919420548.

The previous prime is 919420529. The next prime is 919420589. The reversal of 919420549 is 945024919.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 757240324 + 162180225 = 27518^2 + 12735^2 .

It is a cyclic number.

It is not a de Polignac number, because 919420549 - 2¹³ = 919412357 is a prime.

It is a super-2 number, since 2×919420549² = 1690668291846922802, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (919420529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 459710274 + 459710275.

It is an arithmetic number, because the mean of its divisors is an integer number (459710275).

Almost surely, 2^919420549 is an apocalyptic number.

It is an amenable number.

919420549 is a deficient number, since it is larger than the sum of its proper divisors (1).

919420549 is an equidigital number, since it uses as much as digits as its factorization.

919420549 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 116640, while the sum is 43.

The square root of 919420549 is about 30321.9483048171. The cubic root of 919420549 is about 972.3845921869.

The spelling of 919420549 in words is "nine hundred nineteen million, four hundred twenty thousand, five hundred forty-nine".