6721930 has 8 divisors (see below), whose sum is σ = 12099492. Its totient is φ = 2688768.

The previous prime is 6721927. The next prime is 6721943. The reversal of 6721930 is 391276.

It can be written as a sum of positive squares in 2 ways, for example, as 6713281 + 8649 = 2591^2 + 93^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 336087 + ... + 336106.

Almost surely, 2^6721930 is an apocalyptic number.

6721930 is a deficient number, since it is larger than the sum of its proper divisors (5377562).

6721930 is a wasteful number, since it uses less digits than its factorization.

6721930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 672200.

The product of its (nonzero) digits is 2268, while the sum is 28.

The square root of 6721930 is about 2592.6685094705. The cubic root of 6721930 is about 188.7258232560.

The spelling of 6721930 in words is "six million, seven hundred twenty-one thousand, nine hundred thirty".