102770189 has 2 divisors, whose sum is σ = 102770190. Its totient is φ = 102770188.

The previous prime is 102770123. The next prime is 102770191. The reversal of 102770189 is 981077201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68641225 + 34128964 = 8285^2 + 5842^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102770189 is a prime.

Together with 102770191, 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 (102770119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51385094 + 51385095.

It is an arithmetic number, because the mean of its divisors is an integer number (51385095).

Almost surely, 2^102770189 is an apocalyptic number.

It is an amenable number.

102770189 is a deficient number, since it is larger than the sum of its proper divisors (1).

102770189 is an equidigital number, since it uses as much as digits as its factorization.

102770189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7056, while the sum is 35.

The square root of 102770189 is about 10137.5632673735. The cubic root of 102770189 is about 468.4059305260.

The spelling of 102770189 in words is "one hundred two million, seven hundred seventy thousand, one hundred eighty-nine".