7999955 has 16 divisors (see below), whose sum is σ = 9997344. Its totient is φ = 6140160.

The previous prime is 7999921. The next prime is 7999963. The reversal of 7999955 is 5599997.

It is not a de Polignac number, because 7999955 - 2¹⁴ = 7983571 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7999897 and 7999906.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15095 + ... + 15615.

It is an arithmetic number, because the mean of its divisors is an integer number (624834).

Almost surely, 2^7999955 is an apocalyptic number.

7999955 is a deficient number, since it is larger than the sum of its proper divisors (1997389).

7999955 is a wasteful number, since it uses less digits than its factorization.

7999955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 646.

The product of its digits is 1148175, while the sum is 53.

The square root of 7999955 is about 2828.4191697837. The cubic root of 7999955 is about 199.9996249993. Note that the first 3 decimals are identical.

Adding to 7999955 its sum of digits (53), we get a palindrome (8000008).

The spelling of 7999955 in words is "seven million, nine hundred ninety-nine thousand, nine hundred fifty-five".