421879877 has 2 divisors, whose sum is σ = 421879878. Its totient is φ = 421879876.

The previous prime is 421879807. The next prime is 421879891. The reversal of 421879877 is 778978124.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 253892356 + 167987521 = 15934^2 + 12961^2 .

It is a cyclic number.

It is not a de Polignac number, because 421879877 - 2²⁶ = 354771013 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421879807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210939938 + 210939939.

It is an arithmetic number, because the mean of its divisors is an integer number (210939939).

Almost surely, 2^421879877 is an apocalyptic number.

It is an amenable number.

421879877 is a deficient number, since it is larger than the sum of its proper divisors (1).

421879877 is an equidigital number, since it uses as much as digits as its factorization.

421879877 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1580544, while the sum is 53.

The square root of 421879877 is about 20539.7146280079. The cubic root of 421879877 is about 750.0028900629.

The spelling of 421879877 in words is "four hundred twenty-one million, eight hundred seventy-nine thousand, eight hundred seventy-seven".