102509923 has 2 divisors, whose sum is σ = 102509924. Its totient is φ = 102509922.

The previous prime is 102509887. The next prime is 102509929. The reversal of 102509923 is 329905201.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 102509923 - 2¹⁷ = 102378851 is a prime.

It is not a weakly prime, because it can be changed into another prime (102509929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51254961 + 51254962.

It is an arithmetic number, because the mean of its divisors is an integer number (51254962).

Almost surely, 2^102509923 is an apocalyptic number.

102509923 is a deficient number, since it is larger than the sum of its proper divisors (1).

102509923 is an equidigital number, since it uses as much as digits as its factorization.

102509923 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4860, while the sum is 31.

The square root of 102509923 is about 10124.7184158375. The cubic root of 102509923 is about 468.0101828330.

The spelling of 102509923 in words is "one hundred two million, five hundred nine thousand, nine hundred twenty-three".