819819814 has 16 divisors (see below), whose sum is σ = 1358507520. Its totient is φ = 367927560.

The previous prime is 819819799. The next prime is 819819817. The reversal of 819819814 is 418918918.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (819819817) 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, 234114 + ... + 237589.

It is an arithmetic number, because the mean of its divisors is an integer number (84906720).

Almost surely, 2^819819814 is an apocalyptic number.

819819814 is a deficient number, since it is larger than the sum of its proper divisors (538687706).

819819814 is a wasteful number, since it uses less digits than its factorization.

819819814 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 471795.

The product of its digits is 165888, while the sum is 49.

The square root of 819819814 is about 28632.4957696670. The cubic root of 819819814 is about 935.9215994369.

The spelling of 819819814 in words is "eight hundred nineteen million, eight hundred nineteen thousand, eight hundred fourteen".