7923849 has 4 divisors (see below), whose sum is σ = 10565136. Its totient is φ = 5282564.

The previous prime is 7923847. The next prime is 7923857. The reversal of 7923849 is 9483297.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 7923849 - 2¹ = 7923847 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7923849.

It is not an unprimeable number, because it can be changed into a prime (7923847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1320639 + ... + 1320644.

It is an arithmetic number, because the mean of its divisors is an integer number (2641284).

Almost surely, 2^7923849 is an apocalyptic number.

It is an amenable number.

7923849 is a deficient number, since it is larger than the sum of its proper divisors (2641287).

7923849 is a wasteful number, since it uses less digits than its factorization.

7923849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2641286.

The product of its digits is 108864, while the sum is 42.

The square root of 7923849 is about 2814.9332141278. The cubic root of 7923849 is about 199.3633840843.

The spelling of 7923849 in words is "seven million, nine hundred twenty-three thousand, eight hundred forty-nine".