421078631837 has 2 divisors, whose sum is σ = 421078631838. Its totient is φ = 421078631836.

The previous prime is 421078631791. The next prime is 421078631843. The reversal of 421078631837 is 738136870124.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 290811054361 + 130267577476 = 539269^2 + 360926^2 .

It is a cyclic number.

It is not a de Polignac number, because 421078631837 - 2¹⁰ = 421078630813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421078621837) 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, 210539315918 + 210539315919.

It is an arithmetic number, because the mean of its divisors is an integer number (210539315919).

Almost surely, 2^421078631837 is an apocalyptic number.

It is an amenable number.

421078631837 is a deficient number, since it is larger than the sum of its proper divisors (1).

421078631837 is an equidigital number, since it uses as much as digits as its factorization.

421078631837 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1354752, while the sum is 50.

The spelling of 421078631837 in words is "four hundred twenty-one billion, seventy-eight million, six hundred thirty-one thousand, eight hundred thirty-seven".