6980721 has 16 divisors (see below), whose sum is σ = 10214400. Its totient is φ = 4205520.

The previous prime is 6980717. The next prime is 6980731. The reversal of 6980721 is 1270896.

6980721 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 6980721 - 2² = 6980717 is a prime.

It is a super-3 number, since 3×6980721³ (a number of 22 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (6980711) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6036 + ... + 7098.

It is an arithmetic number, because the mean of its divisors is an integer number (638400).

Almost surely, 2^6980721 is an apocalyptic number.

It is an amenable number.

6980721 is a deficient number, since it is larger than the sum of its proper divisors (3233679).

6980721 is a wasteful number, since it uses less digits than its factorization.

6980721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1276.

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 6980721 is about 2642.1054104634. The cubic root of 6980721 is about 191.1173406143.

The spelling of 6980721 in words is "six million, nine hundred eighty thousand, seven hundred twenty-one".