712701721 has 4 divisors (see below), whose sum is σ = 714153744. Its totient is φ = 711249700.

The previous prime is 712701707. The next prime is 712701751. The reversal of 712701721 is 127107217.

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: 127107217 = 2251 ⋅56467.

It is a cyclic number.

It is not a de Polignac number, because 712701721 - 2²⁷ = 578483993 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 712701721.

It is not an unprimeable number, because it can be changed into a prime (712701751) 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, 725275 + ... + 726256.

It is an arithmetic number, because the mean of its divisors is an integer number (178538436).

Almost surely, 2^712701721 is an apocalyptic number.

It is an amenable number.

712701721 is a deficient number, since it is larger than the sum of its proper divisors (1452023).

712701721 is a wasteful number, since it uses less digits than its factorization.

712701721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1452022.

The product of its (nonzero) digits is 1372, while the sum is 28.

The square root of 712701721 is about 26696.4739432008. The cubic root of 712701721 is about 893.2422753621.

Adding to 712701721 its reverse (127107217), we get a palindrome (839808938).

The spelling of 712701721 in words is "seven hundred twelve million, seven hundred one thousand, seven hundred twenty-one".