102627989 has 2 divisors, whose sum is σ = 102627990. Its totient is φ = 102627988.

The previous prime is 102627937. The next prime is 102627991. The reversal of 102627989 is 989726201.

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., 59830225 + 42797764 = 7735^2 + 6542^2 .

It is a cyclic number.

It is not a de Polignac number, because 102627989 - 2¹² = 102623893 is a prime.

Together with 102627991, 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 (102627919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51313994 + 51313995.

It is an arithmetic number, because the mean of its divisors is an integer number (51313995).

Almost surely, 2^102627989 is an apocalyptic number.

It is an amenable number.

102627989 is a deficient number, since it is larger than the sum of its proper divisors (1).

102627989 is an equidigital number, since it uses as much as digits as its factorization.

102627989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 44.

The square root of 102627989 is about 10130.5473198638. The cubic root of 102627989 is about 468.1897911038.

The spelling of 102627989 in words is "one hundred two million, six hundred twenty-seven thousand, nine hundred eighty-nine".