700721 has 4 divisors (see below), whose sum is σ = 800832. Its totient is φ = 600612.

The previous prime is 700717. The next prime is 700751. The reversal of 700721 is 127007.

It is a happy number.

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 700721 - 2² = 700717 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 700721.

It is not an unprimeable number, because it can be changed into a prime (700751) 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, 50045 + ... + 50058.

It is an arithmetic number, because the mean of its divisors is an integer number (200208).

2⁷⁰⁰⁷²¹ is an apocalyptic number.

It is an amenable number.

700721 is a deficient number, since it is larger than the sum of its proper divisors (100111).

700721 is a wasteful number, since it uses less digits than its factorization.

700721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100110.

The product of its (nonzero) digits is 98, while the sum is 17.

The square root of 700721 is about 837.0907955533. The cubic root of 700721 is about 88.8208744179.

Adding to 700721 its reverse (127007), we get a palindrome (827728).

The spelling of 700721 in words is "seven hundred thousand, seven hundred twenty-one", and thus it is an iban number.