39899707 has 2 divisors, whose sum is σ = 39899708. Its totient is φ = 39899706.

The previous prime is 39899701. The next prime is 39899711. The reversal of 39899707 is 70799893.

It is a strong prime.

It is an emirp because it is prime and its reverse (70799893) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39899707 is a prime.

It is not a weakly prime, because it can be changed into another prime (39899701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19949853 + 19949854.

It is an arithmetic number, because the mean of its divisors is an integer number (19949854).

Almost surely, 2^39899707 is an apocalyptic number.

39899707 is a deficient number, since it is larger than the sum of its proper divisors (1).

39899707 is an equidigital number, since it uses as much as digits as its factorization.

39899707 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 857304, while the sum is 52.

The square root of 39899707 is about 6316.6214862061. The cubic root of 39899707 is about 341.7091190822.

The spelling of 39899707 in words is "thirty-nine million, eight hundred ninety-nine thousand, seven hundred seven".