87121471279 has 2 divisors, whose sum is σ = 87121471280. Its totient is φ = 87121471278.

The previous prime is 87121471249. The next prime is 87121471331. The reversal of 87121471279 is 97217412178.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87121471279 - 2²⁹ = 86584600367 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87121471249) 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, 43560735639 + 43560735640.

It is an arithmetic number, because the mean of its divisors is an integer number (43560735640).

Almost surely, 2^87121471279 is an apocalyptic number.

87121471279 is a deficient number, since it is larger than the sum of its proper divisors (1).

87121471279 is an equidigital number, since it uses as much as digits as its factorization.

87121471279 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 395136, while the sum is 49.

The spelling of 87121471279 in words is "eighty-seven billion, one hundred twenty-one million, four hundred seventy-one thousand, two hundred seventy-nine".