87389279129 has 2 divisors, whose sum is σ = 87389279130. Its totient is φ = 87389279128.

The previous prime is 87389279099. The next prime is 87389279191. The reversal of 87389279129 is 92197298378.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69124297225 + 18264981904 = 262915^2 + 135148^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87389279129 is a prime.

It is a super-3 number, since 3×87389279129³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (87389276129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43694639564 + 43694639565.

It is an arithmetic number, because the mean of its divisors is an integer number (43694639565).

Almost surely, 2^87389279129 is an apocalyptic number.

It is an amenable number.

87389279129 is a deficient number, since it is larger than the sum of its proper divisors (1).

87389279129 is an equidigital number, since it uses as much as digits as its factorization.

87389279129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27433728, while the sum is 65.

The spelling of 87389279129 in words is "eighty-seven billion, three hundred eighty-nine million, two hundred seventy-nine thousand, one hundred twenty-nine".