102643423 has 2 divisors, whose sum is σ = 102643424. Its totient is φ = 102643422.

The previous prime is 102643417. The next prime is 102643427. The reversal of 102643423 is 324346201.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 102643423 - 2⁵ = 102643391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102643427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51321711 + 51321712.

It is an arithmetic number, because the mean of its divisors is an integer number (51321712).

Almost surely, 2^102643423 is an apocalyptic number.

102643423 is a deficient number, since it is larger than the sum of its proper divisors (1).

102643423 is an equidigital number, since it uses as much as digits as its factorization.

102643423 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 102643423 is about 10131.3090467126. The cubic root of 102643423 is about 468.2132599421.

Adding to 102643423 its reverse (324346201), we get a palindrome (426989624).

The spelling of 102643423 in words is "one hundred two million, six hundred forty-three thousand, four hundred twenty-three".