8861819 has 4 divisors (see below), whose sum is σ = 8961480. Its totient is φ = 8762160.

The previous prime is 8861813. The next prime is 8861837. The reversal of 8861819 is 9181688.

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 8861819 - 2⁸ = 8861563 is a prime.

It is a super-2 number, since 2×8861819² = 157063671977522, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8861813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49697 + ... + 49874.

It is an arithmetic number, because the mean of its divisors is an integer number (2240370).

Almost surely, 2^8861819 is an apocalyptic number.

8861819 is a gapful number since it is divisible by the number (89) formed by its first and last digit.

8861819 is a deficient number, since it is larger than the sum of its proper divisors (99661).

8861819 is an equidigital number, since it uses as much as digits as its factorization.

8861819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99660.

The product of its digits is 27648, while the sum is 41.

The square root of 8861819 is about 2976.8807500469. The cubic root of 8861819 is about 206.9383388109.

The spelling of 8861819 in words is "eight million, eight hundred sixty-one thousand, eight hundred nineteen".