7981369 has 4 divisors (see below), whose sum is σ = 8706960. Its totient is φ = 7255780.

The previous prime is 7981339. The next prime is 7981397. The reversal of 7981369 is 9631897.

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, and also an emirpimes, since its reverse is a distinct semiprime: 9631897 = 11 ⋅875627.

It is a cyclic number.

It is not a de Polignac number, because 7981369 - 2²¹ = 5884217 is a prime.

It is a super-2 number, since 2×7981369² = 127404502228322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7981319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 362779 + ... + 362800.

It is an arithmetic number, because the mean of its divisors is an integer number (2176740).

Almost surely, 2^7981369 is an apocalyptic number.

It is an amenable number.

7981369 is a deficient number, since it is larger than the sum of its proper divisors (725591).

7981369 is a wasteful number, since it uses less digits than its factorization.

7981369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 725590.

The product of its digits is 81648, while the sum is 43.

The square root of 7981369 is about 2825.1316783470. The cubic root of 7981369 is about 199.8446209847.

The spelling of 7981369 in words is "seven million, nine hundred eighty-one thousand, three hundred sixty-nine".