8219949 has 4 divisors (see below), whose sum is σ = 10959936. Its totient is φ = 5479964.

The previous prime is 8219941. The next prime is 8219969. The reversal of 8219949 is 9499128.

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 8219949 - 2³ = 8219941 is a prime.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 8219949.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8219941) 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, 1369989 + ... + 1369994.

It is an arithmetic number, because the mean of its divisors is an integer number (2739984).

Almost surely, 2^8219949 is an apocalyptic number.

It is an amenable number.

8219949 is a deficient number, since it is larger than the sum of its proper divisors (2739987).

8219949 is a wasteful number, since it uses less digits than its factorization.

8219949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2739986.

The product of its digits is 46656, while the sum is 42.

The square root of 8219949 is about 2867.0453432061. The cubic root of 8219949 is about 201.8163625317.

The spelling of 8219949 in words is "eight million, two hundred nineteen thousand, nine hundred forty-nine".