420948877 has 2 divisors, whose sum is σ = 420948878. Its totient is φ = 420948876.

The previous prime is 420948841. The next prime is 420948881. The reversal of 420948877 is 778849024.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 360202441 + 60746436 = 18979^2 + 7794^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-420948877 is a prime.

It is a super-2 number, since 2×420948877² = 354395914095122258, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 420948877.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420948377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210474438 + 210474439.

It is an arithmetic number, because the mean of its divisors is an integer number (210474439).

Almost surely, 2^420948877 is an apocalyptic number.

It is an amenable number.

420948877 is a deficient number, since it is larger than the sum of its proper divisors (1).

420948877 is an equidigital number, since it uses as much as digits as its factorization.

420948877 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 903168, while the sum is 49.

The square root of 420948877 is about 20517.0386995785. The cubic root of 420948877 is about 749.4507842847.

The spelling of 420948877 in words is "four hundred twenty million, nine hundred forty-eight thousand, eight hundred seventy-seven".