102019 has 2 divisors, whose sum is σ = 102020. Its totient is φ = 102018.

The previous prime is 102013. The next prime is 102023. The reversal of 102019 is 910201.

It is a strong prime.

It is an emirp because it is prime and its reverse (910201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 102019 - 2⁵ = 101987 is a prime.

It is a super-2 number, since 2×102019² = 20815752722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (102013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51009 + 51010.

It is an arithmetic number, because the mean of its divisors is an integer number (51010).

2¹⁰²⁰¹⁹ is an apocalyptic number.

102019 is a deficient number, since it is larger than the sum of its proper divisors (1).

102019 is an equidigital number, since it uses as much as digits as its factorization.

102019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 102019 is about 319.4041327222. The cubic root of 102019 is about 46.7261882226.

It can be divided in two parts, 10201 and 9, that multiplied together give a square (91809 = 303²).

The spelling of 102019 in words is "one hundred two thousand, nineteen".