486639421 has 2 divisors, whose sum is σ = 486639422. Its totient is φ = 486639420.

The previous prime is 486639409. The next prime is 486639449. The reversal of 486639421 is 124936684.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 486202500 + 436921 = 22050^2 + 661^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-486639421 is a prime.

It is equal to p_25688437 and since 486639421 and 25688437 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (486639521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 243319710 + 243319711.

It is an arithmetic number, because the mean of its divisors is an integer number (243319711).

Almost surely, 2^486639421 is an apocalyptic number.

It is an amenable number.

486639421 is a deficient number, since it is larger than the sum of its proper divisors (1).

486639421 is an equidigital number, since it uses as much as digits as its factorization.

486639421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 248832, while the sum is 43.

The square root of 486639421 is about 22059.9052808483. The cubic root of 486639421 is about 786.5670731390.

The spelling of 486639421 in words is "four hundred eighty-six million, six hundred thirty-nine thousand, four hundred twenty-one".