987125197 has 2 divisors, whose sum is σ = 987125198. Its totient is φ = 987125196.

The previous prime is 987125189. The next prime is 987125207. The reversal of 987125197 is 791521789.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 774286276 + 212838921 = 27826^2 + 14589^2 .

It is an emirp because it is prime and its reverse (791521789) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 987125197 - 2³ = 987125189 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 987125197.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (987135197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 493562598 + 493562599.

It is an arithmetic number, because the mean of its divisors is an integer number (493562599).

Almost surely, 2^987125197 is an apocalyptic number.

It is an amenable number.

987125197 is a deficient number, since it is larger than the sum of its proper divisors (1).

987125197 is an equidigital number, since it uses as much as digits as its factorization.

987125197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 317520, while the sum is 49.

The square root of 987125197 is about 31418.5486138364. The cubic root of 987125197 is about 995.6898482827.

The spelling of 987125197 in words is "nine hundred eighty-seven million, one hundred twenty-five thousand, one hundred ninety-seven".