7919091 has 12 divisors (see below), whose sum is σ = 11484720. Its totient is φ = 5258160.

The previous prime is 7919089. The next prime is 7919123. The reversal of 7919091 is 1909197.

7919091 = 19² + 20² + ... + 287².

It is not a de Polignac number, because 7919091 - 2¹ = 7919089 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (7919071) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 786 + ... + 4056.

It is an arithmetic number, because the mean of its divisors is an integer number (957060).

Almost surely, 2^7919091 is an apocalyptic number.

7919091 is a deficient number, since it is larger than the sum of its proper divisors (3565629).

7919091 is a wasteful number, since it uses less digits than its factorization.

7919091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3546 (or 3543 counting only the distinct ones).

The product of its (nonzero) digits is 5103, while the sum is 36.

The square root of 7919091 is about 2814.0879517172. The cubic root of 7919091 is about 199.3234724661.

The spelling of 7919091 in words is "seven million, nine hundred nineteen thousand, ninety-one".