7090891 has 4 divisors (see below), whose sum is σ = 7120800. Its totient is φ = 7060984.

The previous prime is 7090873. The next prime is 7090901. The reversal of 7090891 is 1980907.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 7090891 - 2⁵ = 7090859 is a prime.

It is a Duffinian number.

7090891 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (7090801) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14596 + ... + 15073.

It is an arithmetic number, because the mean of its divisors is an integer number (1780200).

Almost surely, 2^7090891 is an apocalyptic number.

7090891 is a deficient number, since it is larger than the sum of its proper divisors (29909).

7090891 is a wasteful number, since it uses less digits than its factorization.

7090891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29908.

The product of its (nonzero) digits is 4536, while the sum is 34.

The square root of 7090891 is about 2662.8726969196. The cubic root of 7090891 is about 192.1175043890.

The spelling of 7090891 in words is "seven million, ninety thousand, eight hundred ninety-one".