102819843 has 48 divisors (see below), whose sum is σ = 174853120. Its totient is φ = 57013632.

The previous prime is 102819817. The next prime is 102819863. The reversal of 102819843 is 348918201.

It is not a de Polignac number, because 102819843 - 2⁶ = 102819779 is a prime.

It is a super-2 number, since 2×102819843² = 21143840229089298, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102819798 and 102819807.

It is not an unprimeable number, because it can be changed into a prime (102819863) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 363180 + ... + 363462.

Almost surely, 2^102819843 is an apocalyptic number.

102819843 is a deficient number, since it is larger than the sum of its proper divisors (72033277).

102819843 is a wasteful number, since it uses less digits than its factorization.

102819843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 448 (or 445 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 102819843 is about 10140.0119822414. The cubic root of 102819843 is about 468.4813560410.

The spelling of 102819843 in words is "one hundred two million, eight hundred nineteen thousand, eight hundred forty-three".