7999969 has 8 divisors (see below), whose sum is σ = 8712000. Its totient is φ = 7317072.

The previous prime is 7999963. The next prime is 7999993. The reversal of 7999969 is 9699997.

It is a happy number.

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 7999969 - 2¹³ = 7991777 is a prime.

It is a super-2 number, since 2×7999969² = 127999008001922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7999963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6709 + ... + 7810.

It is an arithmetic number, because the mean of its divisors is an integer number (1089000).

Almost surely, 2^7999969 is an apocalyptic number.

It is an amenable number.

7999969 is a deficient number, since it is larger than the sum of its proper divisors (712031).

7999969 is a wasteful number, since it uses less digits than its factorization.

7999969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14567.

The product of its digits is 2480058, while the sum is 58.

The square root of 7999969 is about 2828.4216446633. The cubic root of 7999969 is about 199.9997416663. Note that the first 3 decimals are identical.

The spelling of 7999969 in words is "seven million, nine hundred ninety-nine thousand, nine hundred sixty-nine".