187280212069 has 2 divisors, whose sum is σ = 187280212070. Its totient is φ = 187280212068.

The previous prime is 187280212013. The next prime is 187280212079. The reversal of 187280212069 is 960212082781.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 177293207844 + 9987004225 = 421062^2 + 99935^2 .

It is a cyclic number.

It is not a de Polignac number, because 187280212069 - 2²³ = 187271823461 is a prime.

It is a super-2 number, since 2×187280212069² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (187280212079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 93640106034 + 93640106035.

It is an arithmetic number, because the mean of its divisors is an integer number (93640106035).

Almost surely, 2^187280212069 is an apocalyptic number.

It is an amenable number.

187280212069 is a deficient number, since it is larger than the sum of its proper divisors (1).

187280212069 is an equidigital number, since it uses as much as digits as its factorization.

187280212069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 193536, while the sum is 46.

The spelling of 187280212069 in words is "one hundred eighty-seven billion, two hundred eighty million, two hundred twelve thousand, sixty-nine".