7849861 has 4 divisors (see below), whose sum is σ = 7859052. Its totient is φ = 7840672.

The previous prime is 7849847. The next prime is 7849879. The reversal of 7849861 is 1689487.

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

It can be written as a sum of positive squares in 2 ways, for example, as 4124961 + 3724900 = 2031^2 + 1930^2 .

It is a cyclic number.

It is not a de Polignac number, because 7849861 - 2¹¹ = 7847813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7849811) 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, 3166 + ... + 5071.

It is an arithmetic number, because the mean of its divisors is an integer number (1964763).

Almost surely, 2^7849861 is an apocalyptic number.

It is an amenable number.

7849861 is a deficient number, since it is larger than the sum of its proper divisors (9191).

7849861 is an equidigital number, since it uses as much as digits as its factorization.

7849861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9190.

The product of its digits is 96768, while the sum is 43.

The square root of 7849861 is about 2801.7603395009. The cubic root of 7849861 is about 198.7409320388.

The spelling of 7849861 in words is "seven million, eight hundred forty-nine thousand, eight hundred sixty-one".