102244991 has 2 divisors, whose sum is σ = 102244992. Its totient is φ = 102244990.

The previous prime is 102244957. The next prime is 102244993. The reversal of 102244991 is 199442201.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102244991 is a prime.

Together with 102244993, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102244993) 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, 51122495 + 51122496.

It is an arithmetic number, because the mean of its divisors is an integer number (51122496).

Almost surely, 2^102244991 is an apocalyptic number.

102244991 is a deficient number, since it is larger than the sum of its proper divisors (1).

102244991 is an equidigital number, since it uses as much as digits as its factorization.

102244991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 102244991 is about 10111.6265259354. The cubic root of 102244991 is about 467.6066516758.

The spelling of 102244991 in words is "one hundred two million, two hundred forty-four thousand, nine hundred ninety-one".