39870071 has 2 divisors, whose sum is σ = 39870072. Its totient is φ = 39870070.

The previous prime is 39870043. The next prime is 39870079. The reversal of 39870071 is 17007893.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 39870071 - 2¹⁰ = 39869047 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39870079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19935035 + 19935036.

It is an arithmetic number, because the mean of its divisors is an integer number (19935036).

Almost surely, 2^39870071 is an apocalyptic number.

39870071 is a deficient number, since it is larger than the sum of its proper divisors (1).

39870071 is an equidigital number, since it uses as much as digits as its factorization.

39870071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10584, while the sum is 35.

The square root of 39870071 is about 6314.2751761386. The cubic root of 39870071 is about 341.6244952379.

The spelling of 39870071 in words is "thirty-nine million, eight hundred seventy thousand, seventy-one".