423880549 has 2 divisors, whose sum is σ = 423880550. Its totient is φ = 423880548.

The previous prime is 423880507. The next prime is 423880609. The reversal of 423880549 is 945088324.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 233937025 + 189943524 = 15295^2 + 13782^2 .

It is a cyclic number.

It is not a de Polignac number, because 423880549 - 2⁷ = 423880421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (423880049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211940274 + 211940275.

It is an arithmetic number, because the mean of its divisors is an integer number (211940275).

Almost surely, 2^423880549 is an apocalyptic number.

It is an amenable number.

423880549 is a deficient number, since it is larger than the sum of its proper divisors (1).

423880549 is an equidigital number, since it uses as much as digits as its factorization.

423880549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 276480, while the sum is 43.

The square root of 423880549 is about 20588.3595509696. The cubic root of 423880549 is about 751.1865951474.

The spelling of 423880549 in words is "four hundred twenty-three million, eight hundred eighty thousand, five hundred forty-nine".