102019843 has 2 divisors, whose sum is σ = 102019844. Its totient is φ = 102019842.

The previous prime is 102019837. The next prime is 102019867. The reversal of 102019843 is 348910201.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 102019843 - 2⁵ = 102019811 is a prime.

It is not a weakly prime, because it can be changed into another prime (102019823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51009921 + 51009922.

It is an arithmetic number, because the mean of its divisors is an integer number (51009922).

Almost surely, 2^102019843 is an apocalyptic number.

102019843 is a deficient number, since it is larger than the sum of its proper divisors (1).

102019843 is an equidigital number, since it uses as much as digits as its factorization.

102019843 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 102019843 is about 10100.4872654739. The cubic root of 102019843 is about 467.2631692432.

The spelling of 102019843 in words is "one hundred two million, nineteen thousand, eight hundred forty-three".