709999989 has 8 divisors (see below), whose sum is σ = 946969152. Its totient is φ = 473182080.

The previous prime is 709999987. The next prime is 710000021. The reversal of 709999989 is 989999907.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 709999989 - 2¹ = 709999987 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (709999981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26364 + ... + 45989.

It is an arithmetic number, because the mean of its divisors is an integer number (118371144).

Almost surely, 2^709999989 is an apocalyptic number.

It is an amenable number.

709999989 is a deficient number, since it is larger than the sum of its proper divisors (236969163).

709999989 is a wasteful number, since it uses less digits than its factorization.

709999989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75627.

The product of its (nonzero) digits is 29760696, while the sum is 69.

The square root of 709999989 is about 26645.8249825371. The cubic root of 709999989 is about 892.1121358385.

The spelling of 709999989 in words is "seven hundred nine million, nine hundred ninety-nine thousand, nine hundred eighty-nine".