102019867 has 2 divisors, whose sum is σ = 102019868. Its totient is φ = 102019866.

The previous prime is 102019843. The next prime is 102019871. The reversal of 102019867 is 768910201.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (768910201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 102019867 - 2⁷ = 102019739 is a prime.

It is not a weakly prime, because it can be changed into another prime (102019807) 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 as a sum of consecutive naturals, namely, 51009933 + 51009934.

It is an arithmetic number, because the mean of its divisors is an integer number (51009934).

Almost surely, 2^102019867 is an apocalyptic number.

102019867 is a deficient number, since it is larger than the sum of its proper divisors (1).

102019867 is an equidigital number, since it uses as much as digits as its factorization.

102019867 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 34.

The square root of 102019867 is about 10100.4884535353. The cubic root of 102019867 is about 467.2632058842.

The spelling of 102019867 in words is "one hundred two million, nineteen thousand, eight hundred sixty-seven".