709897 has 4 divisors (see below), whose sum is σ = 747280. Its totient is φ = 672516.

The previous prime is 709879. The next prime is 709901. The reversal of 709897 is 798907.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 798907 = 587 ⋅1361.

It is a cyclic number.

It is not a de Polignac number, because 709897 - 2⁷ = 709769 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (709817) 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, 18663 + ... + 18700.

It is an arithmetic number, because the mean of its divisors is an integer number (186820).

2⁷⁰⁹⁸⁹⁷ is an apocalyptic number.

It is an amenable number.

709897 is a deficient number, since it is larger than the sum of its proper divisors (37383).

709897 is a wasteful number, since it uses less digits than its factorization.

709897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37382.

The product of its (nonzero) digits is 31752, while the sum is 40.

The square root of 709897 is about 842.5538558454. The cubic root of 709897 is about 89.2068998664.

The spelling of 709897 in words is "seven hundred nine thousand, eight hundred ninety-seven".