102538243 has 2 divisors, whose sum is σ = 102538244. Its totient is φ = 102538242.

The previous prime is 102538217. The next prime is 102538279. The reversal of 102538243 is 342835201.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 102538243 - 2⁹ = 102537731 is a prime.

It is not a weakly prime, because it can be changed into another prime (102538213) 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, 51269121 + 51269122.

It is an arithmetic number, because the mean of its divisors is an integer number (51269122).

Almost surely, 2^102538243 is an apocalyptic number.

102538243 is a deficient number, since it is larger than the sum of its proper divisors (1).

102538243 is an equidigital number, since it uses as much as digits as its factorization.

102538243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 102538243 is about 10126.1168766709. The cubic root of 102538243 is about 468.0532772887.

It can be divided in two parts, 10253 and 8243, that added together give a square (18496 = 136²).

The spelling of 102538243 in words is "one hundred two million, five hundred thirty-eight thousand, two hundred forty-three".