421479637 has 2 divisors, whose sum is σ = 421479638. Its totient is φ = 421479636.

The previous prime is 421479629. The next prime is 421479697. The reversal of 421479637 is 736974124.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 406183716 + 15295921 = 20154^2 + 3911^2 .

It is a cyclic number.

It is not a de Polignac number, because 421479637 - 2³ = 421479629 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 421479593 and 421479602.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421479697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210739818 + 210739819.

It is an arithmetic number, because the mean of its divisors is an integer number (210739819).

Almost surely, 2^421479637 is an apocalyptic number.

It is an amenable number.

421479637 is a deficient number, since it is larger than the sum of its proper divisors (1).

421479637 is an equidigital number, since it uses as much as digits as its factorization.

421479637 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 254016, while the sum is 43.

The square root of 421479637 is about 20529.9692401133. The cubic root of 421479637 is about 749.7656375881.

The spelling of 421479637 in words is "four hundred twenty-one million, four hundred seventy-nine thousand, six hundred thirty-seven".