6279981 has 4 divisors (see below), whose sum is σ = 8373312. Its totient is φ = 4186652.

The previous prime is 6279961. The next prime is 6279983. The reversal of 6279981 is 1899726.

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 6279981 - 2⁷ = 6279853 is a prime.

It is a super-2 number, since 2×6279981² = 78876322720722, which contains 22 as substring.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6279983) 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, 1046661 + ... + 1046666.

It is an arithmetic number, because the mean of its divisors is an integer number (2093328).

Almost surely, 2^6279981 is an apocalyptic number.

It is an amenable number.

6279981 is a deficient number, since it is larger than the sum of its proper divisors (2093331).

6279981 is a wasteful number, since it uses less digits than its factorization.

6279981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2093330.

The product of its digits is 54432, while the sum is 42.

The square root of 6279981 is about 2505.9890263128. The cubic root of 6279981 is about 184.4956410865.

It can be divided in two parts, 6279 and 981, that added together give a triangular number (7260 = T₁₂₀).

The spelling of 6279981 in words is "six million, two hundred seventy-nine thousand, nine hundred eighty-one".