420204749749 has 2 divisors, whose sum is σ = 420204749750. Its totient is φ = 420204749748.

The previous prime is 420204749719. The next prime is 420204749791. The reversal of 420204749749 is 947947402024.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 220695127524 + 199509622225 = 469782^2 + 446665^2 .

It is a cyclic number.

It is not a de Polignac number, because 420204749749 - 2⁵ = 420204749717 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 420204749696 and 420204749705.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420204749719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210102374874 + 210102374875.

It is an arithmetic number, because the mean of its divisors is an integer number (210102374875).

Almost surely, 2^420204749749 is an apocalyptic number.

It is an amenable number.

420204749749 is a deficient number, since it is larger than the sum of its proper divisors (1).

420204749749 is an equidigital number, since it uses as much as digits as its factorization.

420204749749 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4064256, while the sum is 52.

The spelling of 420204749749 in words is "four hundred twenty billion, two hundred four million, seven hundred forty-nine thousand, seven hundred forty-nine".