999707939 has 2 divisors, whose sum is σ = 999707940. Its totient is φ = 999707938.

The previous prime is 999707927. The next prime is 999707957. The reversal of 999707939 is 939707999.

It is a weak prime.

It is an emirp because it is prime and its reverse (939707999) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 999707939 - 2¹⁶ = 999642403 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (999707959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499853969 + 499853970.

It is an arithmetic number, because the mean of its divisors is an integer number (499853970).

Almost surely, 2^999707939 is an apocalyptic number.

999707939 is a deficient number, since it is larger than the sum of its proper divisors (1).

999707939 is an equidigital number, since it uses as much as digits as its factorization.

999707939 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8680203, while the sum is 62.

The square root of 999707939 is about 31618.1583745796. The cubic root of 999707939 is about 999.9026368541.

The spelling of 999707939 in words is "nine hundred ninety-nine million, seven hundred seven thousand, nine hundred thirty-nine".