8121619 has 8 divisors (see below), whose sum is σ = 8985600. Its totient is φ = 7278600.

The previous prime is 8121613. The next prime is 8121623. The reversal of 8121619 is 9161218.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 8121619 - 2⁵ = 8121587 is a prime.

It is a super-2 number, since 2×8121619² = 131921390362322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8121613) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4419 + ... + 5980.

It is an arithmetic number, because the mean of its divisors is an integer number (1123200).

Almost surely, 2^8121619 is an apocalyptic number.

8121619 is a deficient number, since it is larger than the sum of its proper divisors (863981).

8121619 is a wasteful number, since it uses less digits than its factorization.

8121619 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10481.

The product of its digits is 864, while the sum is 28.

The square root of 8121619 is about 2849.8454344052. The cubic root of 8121619 is about 201.0083987811.

The spelling of 8121619 in words is "eight million, one hundred twenty-one thousand, six hundred nineteen".