39945504007 has 2 divisors, whose sum is σ = 39945504008. Its totient is φ = 39945504006.

The previous prime is 39945503957. The next prime is 39945504023. The reversal of 39945504007 is 70040554993.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (70040554993) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 39945504007 - 2²⁷ = 39811286279 is a prime.

It is a super-3 number, since 3×39945504007³ (a number of 33 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39945504077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19972752003 + 19972752004.

It is an arithmetic number, because the mean of its divisors is an integer number (19972752004).

Almost surely, 2^39945504007 is an apocalyptic number.

39945504007 is a deficient number, since it is larger than the sum of its proper divisors (1).

39945504007 is an equidigital number, since it uses as much as digits as its factorization.

39945504007 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 680400, while the sum is 46.

The spelling of 39945504007 in words is "thirty-nine billion, nine hundred forty-five million, five hundred four thousand, seven".