102189077 has 2 divisors, whose sum is σ = 102189078. Its totient is φ = 102189076.

The previous prime is 102189067. The next prime is 102189083. The reversal of 102189077 is 770981201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 91891396 + 10297681 = 9586^2 + 3209^2 .

It is an emirp because it is prime and its reverse (770981201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 102189077 - 2⁶ = 102189013 is a prime.

It is a super-2 number, since 2×102189077² = 20885214916223858, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102189037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51094538 + 51094539.

It is an arithmetic number, because the mean of its divisors is an integer number (51094539).

Almost surely, 2^102189077 is an apocalyptic number.

It is an amenable number.

102189077 is a deficient number, since it is larger than the sum of its proper divisors (1).

102189077 is an equidigital number, since it uses as much as digits as its factorization.

102189077 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 102189077 is about 10108.8613107511. The cubic root of 102189077 is about 467.5213972114.

The spelling of 102189077 in words is "one hundred two million, one hundred eighty-nine thousand, seventy-seven".