6430981 has 8 divisors (see below), whose sum is σ = 7029504. Its totient is φ = 5856960.

The previous prime is 6430969. The next prime is 6430997. The reversal of 6430981 is 1890346.

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 6430981 - 2²¹ = 4333829 is a prime.

It is a super-2 number, since 2×6430981² = 82715033244722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6430901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5575 + ... + 6628.

It is an arithmetic number, because the mean of its divisors is an integer number (878688).

Almost surely, 2^6430981 is an apocalyptic number.

It is an amenable number.

6430981 is a deficient number, since it is larger than the sum of its proper divisors (598523).

6430981 is a wasteful number, since it uses less digits than its factorization.

6430981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12251.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 6430981 is about 2535.9378935613. The cubic root of 6430981 is about 185.9626567803.

The spelling of 6430981 in words is "six million, four hundred thirty thousand, nine hundred eighty-one".