7999951 has 4 divisors (see below), whose sum is σ = 8012512. Its totient is φ = 7987392.

The previous prime is 7999921. The next prime is 7999963. The reversal of 7999951 is 1599997.

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

It is a cyclic number.

It is not a de Polignac number, because 7999951 - 2⁵ = 7999919 is a prime.

It is a Duffinian number.

7999951 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 7999895 and 7999904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7999921) 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, 5271 + ... + 6616.

It is an arithmetic number, because the mean of its divisors is an integer number (2003128).

Almost surely, 2^7999951 is an apocalyptic number.

7999951 is a deficient number, since it is larger than the sum of its proper divisors (12561).

7999951 is a wasteful number, since it uses less digits than its factorization.

7999951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12560.

The product of its digits is 229635, while the sum is 49.

The square root of 7999951 is about 2828.4184626749. The cubic root of 7999951 is about 199.9995916658. Note that the first 3 decimals are identical.

Adding to 7999951 its sum of digits (49), we get a cube (8000000 = 200³).

The spelling of 7999951 in words is "seven million, nine hundred ninety-nine thousand, nine hundred fifty-one".