7991755 has 8 divisors (see below), whose sum is σ = 9698400. Its totient is φ = 6321216.

The previous prime is 7991749. The next prime is 7991759. The reversal of 7991755 is 5571997.

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 7991755 - 2³ = 7991747 is a prime.

7991755 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (7991759) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8535 + ... + 9424.

It is an arithmetic number, because the mean of its divisors is an integer number (1212300).

Almost surely, 2^7991755 is an apocalyptic number.

7991755 is a deficient number, since it is larger than the sum of its proper divisors (1706645).

7991755 is a wasteful number, since it uses less digits than its factorization.

7991755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18053.

The product of its digits is 99225, while the sum is 43.

The square root of 7991755 is about 2826.9692251597. The cubic root of 7991755 is about 199.9312680490.

The spelling of 7991755 in words is "seven million, nine hundred ninety-one thousand, seven hundred fifty-five".