102920243 has 2 divisors, whose sum is σ = 102920244. Its totient is φ = 102920242.

The previous prime is 102920221. The next prime is 102920269. The reversal of 102920243 is 342029201.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 102920243 - 2⁶ = 102920179 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (102920443) 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, 51460121 + 51460122.

It is an arithmetic number, because the mean of its divisors is an integer number (51460122).

Almost surely, 2^102920243 is an apocalyptic number.

102920243 is a deficient number, since it is larger than the sum of its proper divisors (1).

102920243 is an equidigital number, since it uses as much as digits as its factorization.

102920243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 102920243 is about 10144.9614587735. The cubic root of 102920243 is about 468.6337916849.

Adding to 102920243 its reverse (342029201), we get a palindrome (444949444).

The spelling of 102920243 in words is "one hundred two million, nine hundred twenty thousand, two hundred forty-three".