712989217 has 4 divisors (see below), whose sum is σ = 725073840. Its totient is φ = 700904596.

The previous prime is 712989209. The next prime is 712989239.

712989217 is nontrivially palindromic in base 10.

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.

It is a cyclic number.

It is not a de Polignac number, because 712989217 - 2³ = 712989209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (712989247) 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, 6042223 + ... + 6042340.

It is an arithmetic number, because the mean of its divisors is an integer number (181268460).

Almost surely, 2^712989217 is an apocalyptic number.

It is an amenable number.

712989217 is a deficient number, since it is larger than the sum of its proper divisors (12084623).

712989217 is a wasteful number, since it uses less digits than its factorization.

712989217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12084622.

The product of its digits is 127008, while the sum is 46.

The square root of 712989217 is about 26701.8579316122. The cubic root of 712989217 is about 893.3623672372.

The spelling of 712989217 in words is "seven hundred twelve million, nine hundred eighty-nine thousand, two hundred seventeen".