7984981 has 4 divisors (see below), whose sum is σ = 8002764. Its totient is φ = 7967200.

The previous prime is 7984957. The next prime is 7985009. The reversal of 7984981 is 1894897.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2387025 + 5597956 = 1545^2 + 2366^2 .

It is a cyclic number.

It is not a de Polignac number, because 7984981 - 2¹⁹ = 7460693 is a prime.

It is a super-2 number, since 2×7984981² = 127519843140722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7984901) 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, 8200 + ... + 9121.

It is an arithmetic number, because the mean of its divisors is an integer number (2000691).

Almost surely, 2^7984981 is an apocalyptic number.

It is an amenable number.

7984981 is a deficient number, since it is larger than the sum of its proper divisors (17783).

7984981 is a wasteful number, since it uses less digits than its factorization.

7984981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17782.

The product of its digits is 145152, while the sum is 46.

The square root of 7984981 is about 2825.7708682765. The cubic root of 7984981 is about 199.8747632618.

The spelling of 7984981 in words is "seven million, nine hundred eighty-four thousand, nine hundred eighty-one".