7899705 has 24 divisors (see below), whose sum is σ = 14938560. Its totient is φ = 3829920.

The previous prime is 7899701. The next prime is 7899719. The reversal of 7899705 is 5079987.

It is not a de Polignac number, because 7899705 - 2² = 7899701 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7899701) 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 23 ways as a sum of consecutive naturals, for example, 7485 + ... + 8474.

It is an arithmetic number, because the mean of its divisors is an integer number (622440).

Almost surely, 2^7899705 is an apocalyptic number.

It is an amenable number.

7899705 is a deficient number, since it is larger than the sum of its proper divisors (7038855).

7899705 is a wasteful number, since it uses less digits than its factorization.

7899705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15981 (or 15978 counting only the distinct ones).

The product of its (nonzero) digits is 158760, while the sum is 45.

The square root of 7899705 is about 2810.6413858762. The cubic root of 7899705 is about 199.1606910629.

The spelling of 7899705 in words is "seven million, eight hundred ninety-nine thousand, seven hundred five".