999708439 has 4 divisors (see below), whose sum is σ = 1026727624. Its totient is φ = 972689256.

The previous prime is 999708397. The next prime is 999708467. The reversal of 999708439 is 934807999.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 999708439 - 2⁹ = 999707927 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999705439) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13509537 + ... + 13509610.

It is an arithmetic number, because the mean of its divisors is an integer number (256681906).

Almost surely, 2^999708439 is an apocalyptic number.

999708439 is a deficient number, since it is larger than the sum of its proper divisors (27019185).

999708439 is a wasteful number, since it uses less digits than its factorization.

999708439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27019184.

The product of its (nonzero) digits is 4408992, while the sum is 58.

The square root of 999708439 is about 31618.1662814275. The cubic root of 999708439 is about 999.9028035532.

The spelling of 999708439 in words is "nine hundred ninety-nine million, seven hundred eight thousand, four hundred thirty-nine".