7187389061 has 2 divisors, whose sum is σ = 7187389062. Its totient is φ = 7187389060.

The previous prime is 7187389051. The next prime is 7187389063. The reversal of 7187389061 is 1609837817.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6079164961 + 1108224100 = 77969^2 + 33290^2 .

It is a cyclic number.

It is not a de Polignac number, because 7187389061 - 2⁶ = 7187388997 is a prime.

It is a Sophie Germain prime.

Together with 7187389063, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7187389063) 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, 3593694530 + 3593694531.

It is an arithmetic number, because the mean of its divisors is an integer number (3593694531).

Almost surely, 2^7187389061 is an apocalyptic number.

It is an amenable number.

7187389061 is a deficient number, since it is larger than the sum of its proper divisors (1).

7187389061 is an equidigital number, since it uses as much as digits as its factorization.

7187389061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 508032, while the sum is 50.

The square root of 7187389061 is about 84778.4705040142. The cubic root of 7187389061 is about 1929.8507281618.

The spelling of 7187389061 in words is "seven billion, one hundred eighty-seven million, three hundred eighty-nine thousand, sixty-one".