710645721 has 4 divisors (see below), whose sum is σ = 947527632. Its totient is φ = 473763812.

The previous prime is 710645711. The next prime is 710645731. The reversal of 710645721 is 127546017.

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 an interprime number because it is at equal distance from previous prime (710645711) and next prime (710645731).

It is a cyclic number.

It is not a de Polignac number, because 710645721 - 2²¹ = 708548569 is a prime.

It is not an unprimeable number, because it can be changed into a prime (710645711) 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, 118440951 + ... + 118440956.

It is an arithmetic number, because the mean of its divisors is an integer number (236881908).

Almost surely, 2^710645721 is an apocalyptic number.

It is an amenable number.

710645721 is a deficient number, since it is larger than the sum of its proper divisors (236881911).

710645721 is a wasteful number, since it uses less digits than its factorization.

710645721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236881910.

The product of its (nonzero) digits is 11760, while the sum is 33.

The square root of 710645721 is about 26657.9391739121. The cubic root of 710645721 is about 892.3825071110.

The spelling of 710645721 in words is "seven hundred ten million, six hundred forty-five thousand, seven hundred twenty-one".