421386677 has 2 divisors, whose sum is σ = 421386678. Its totient is φ = 421386676.

The previous prime is 421386649. The next prime is 421386739. The reversal of 421386677 is 776683124.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 402845041 + 18541636 = 20071^2 + 4306^2 .

It is a cyclic number.

It is not a de Polignac number, because 421386677 - 2⁶ = 421386613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421386607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210693338 + 210693339.

It is an arithmetic number, because the mean of its divisors is an integer number (210693339).

Almost surely, 2^421386677 is an apocalyptic number.

It is an amenable number.

421386677 is a deficient number, since it is larger than the sum of its proper divisors (1).

421386677 is an equidigital number, since it uses as much as digits as its factorization.

421386677 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 338688, while the sum is 44.

The square root of 421386677 is about 20527.7051079754. The cubic root of 421386677 is about 749.7105116838.

The spelling of 421386677 in words is "four hundred twenty-one million, three hundred eighty-six thousand, six hundred seventy-seven".