39994240007 has 2 divisors, whose sum is σ = 39994240008. Its totient is φ = 39994240006.

The previous prime is 39994240003. The next prime is 39994240031. The reversal of 39994240007 is 70004249993.

It is a weak prime.

It is an emirp because it is prime and its reverse (70004249993) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 39994240007 - 2² = 39994240003 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39994240003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19997120003 + 19997120004.

It is an arithmetic number, because the mean of its divisors is an integer number (19997120004).

Almost surely, 2^39994240007 is an apocalyptic number.

39994240007 is a deficient number, since it is larger than the sum of its proper divisors (1).

39994240007 is an equidigital number, since it uses as much as digits as its factorization.

39994240007 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 489888, while the sum is 47.

The spelling of 39994240007 in words is "thirty-nine billion, nine hundred ninety-four million, two hundred forty thousand, seven".