700000021 has 8 divisors (see below), whose sum is σ = 801249344. Its totient is φ = 599063040.

The previous prime is 700000001. The next prime is 700000031. The reversal of 700000021 is 120000007.

700000021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 700000021 - 2²⁵ = 666445589 is a prime.

700000021 is a modest number, since divided by 21 gives 7 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 699999953 and 700000007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (700000001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73260 + ... + 82261.

It is an arithmetic number, because the mean of its divisors is an integer number (100156168).

Almost surely, 2^700000021 is an apocalyptic number.

It is an amenable number.

700000021 is a deficient number, since it is larger than the sum of its proper divisors (101249323).

700000021 is a wasteful number, since it uses less digits than its factorization.

700000021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156171.

The product of its (nonzero) digits is 14, while the sum is 10.

The square root of 700000021 is about 26457.5135075086. The cubic root of 700000021 is about 887.9040106216.

Subtracting from 700000021 its product of nonzero digits (14), we obtain a palindrome (700000007).

Adding to 700000021 its reverse (120000007), we get a palindrome (820000028).

The spelling of 700000021 in words is "seven hundred million, twenty-one", and thus it is an aban number.