39421013 has 2 divisors, whose sum is σ = 39421014. Its totient is φ = 39421012.

The previous prime is 39421009. The next prime is 39421069. The reversal of 39421013 is 31012493.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38912644 + 508369 = 6238^2 + 713^2 .

It is a cyclic number.

It is not a de Polignac number, because 39421013 - 2² = 39421009 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 39421013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39421073) 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, 19710506 + 19710507.

It is an arithmetic number, because the mean of its divisors is an integer number (19710507).

Almost surely, 2^39421013 is an apocalyptic number.

It is an amenable number.

39421013 is a deficient number, since it is larger than the sum of its proper divisors (1).

39421013 is an equidigital number, since it uses as much as digits as its factorization.

39421013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 39421013 is about 6278.6155321058. The cubic root of 39421013 is about 340.3370734453.

The spelling of 39421013 in words is "thirty-nine million, four hundred twenty-one thousand, thirteen".