102181423 has 2 divisors, whose sum is σ = 102181424. Its totient is φ = 102181422.

The previous prime is 102181421. The next prime is 102181427. The reversal of 102181423 is 324181201.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 102181423 - 2¹ = 102181421 is a prime.

Together with 102181421, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 102181394 and 102181403.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102181421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51090711 + 51090712.

It is an arithmetic number, because the mean of its divisors is an integer number (51090712).

Almost surely, 2^102181423 is an apocalyptic number.

102181423 is a deficient number, since it is larger than the sum of its proper divisors (1).

102181423 is an equidigital number, since it uses as much as digits as its factorization.

102181423 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 102181423 is about 10108.4827249197. The cubic root of 102181423 is about 467.5097244110.

The spelling of 102181423 in words is "one hundred two million, one hundred eighty-one thousand, four hundred twenty-three".