7916905 has 8 divisors (see below), whose sum is σ = 9525384. Its totient is φ = 6316800.

The previous prime is 7916897. The next prime is 7916911. The reversal of 7916905 is 5096197.

It can be written as a sum of positive squares in 4 ways, for example, as 32041 + 7884864 = 179^2 + 2808^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 7916905 - 2³ = 7916897 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 225 + ... + 3985.

It is an arithmetic number, because the mean of its divisors is an integer number (1190673).

Almost surely, 2^7916905 is an apocalyptic number.

It is an amenable number.

7916905 is a deficient number, since it is larger than the sum of its proper divisors (1608479).

7916905 is a wasteful number, since it uses less digits than its factorization.

7916905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4187.

The product of its (nonzero) digits is 17010, while the sum is 37.

The square root of 7916905 is about 2813.6995219817. The cubic root of 7916905 is about 199.3051302427.

The spelling of 7916905 in words is "seven million, nine hundred sixteen thousand, nine hundred five".