102219893 has 2 divisors, whose sum is σ = 102219894. Its totient is φ = 102219892.

The previous prime is 102219841. The next prime is 102219899. The reversal of 102219893 is 398912201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 85063729 + 17156164 = 9223^2 + 4142^2 .

It is a cyclic number.

It is not a de Polignac number, because 102219893 - 2¹² = 102215797 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102219899) 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, 51109946 + 51109947.

It is an arithmetic number, because the mean of its divisors is an integer number (51109947).

Almost surely, 2^102219893 is an apocalyptic number.

It is an amenable number.

102219893 is a deficient number, since it is larger than the sum of its proper divisors (1).

102219893 is an equidigital number, since it uses as much as digits as its factorization.

102219893 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 102219893 is about 10110.3854031387. The cubic root of 102219893 is about 467.5683875286.

The spelling of 102219893 in words is "one hundred two million, two hundred nineteen thousand, eight hundred ninety-three".