102210989 has 2 divisors, whose sum is σ = 102210990. Its totient is φ = 102210988.

The previous prime is 102210973. The next prime is 102211003. The reversal of 102210989 is 989012201.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 58782889 + 43428100 = 7667^2 + 6590^2 .

It is a cyclic number.

It is not a de Polignac number, because 102210989 - 2⁴ = 102210973 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102210389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51105494 + 51105495.

It is an arithmetic number, because the mean of its divisors is an integer number (51105495).

Almost surely, 2^102210989 is an apocalyptic number.

It is an amenable number.

102210989 is a deficient number, since it is larger than the sum of its proper divisors (1).

102210989 is an equidigital number, since it uses as much as digits as its factorization.

102210989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 32.

The square root of 102210989 is about 10109.9450542523. The cubic root of 102210989 is about 467.5548110786.

The spelling of 102210989 in words is "one hundred two million, two hundred ten thousand, nine hundred eighty-nine".