420243049 has 2 divisors, whose sum is σ = 420243050. Its totient is φ = 420243048.

The previous prime is 420242993. The next prime is 420243067. The reversal of 420243049 is 940342024.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 228614400 + 191628649 = 15120^2 + 13843^2 .

It is a cyclic number.

It is not a de Polignac number, because 420243049 - 2²³ = 411854441 is a prime.

It is not a weakly prime, because it can be changed into another prime (420243149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210121524 + 210121525.

It is an arithmetic number, because the mean of its divisors is an integer number (210121525).

Almost surely, 2^420243049 is an apocalyptic number.

It is an amenable number.

420243049 is a deficient number, since it is larger than the sum of its proper divisors (1).

420243049 is an equidigital number, since it uses as much as digits as its factorization.

420243049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 420243049 is about 20499.8304627136. The cubic root of 420243049 is about 749.0316682421.

The spelling of 420243049 in words is "four hundred twenty million, two hundred forty-three thousand, forty-nine".