39420071 has 2 divisors, whose sum is σ = 39420072. Its totient is φ = 39420070.

The previous prime is 39420061. The next prime is 39420089. The reversal of 39420071 is 17002493.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39420071 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 39420071.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39420001) 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, 19710035 + 19710036.

It is an arithmetic number, because the mean of its divisors is an integer number (19710036).

Almost surely, 2^39420071 is an apocalyptic number.

39420071 is a deficient number, since it is larger than the sum of its proper divisors (1).

39420071 is an equidigital number, since it uses as much as digits as its factorization.

39420071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 39420071 is about 6278.5405151197. The cubic root of 39420071 is about 340.3343625385.

The spelling of 39420071 in words is "thirty-nine million, four hundred twenty thousand, seventy-one".