87127099929 has 15 divisors (see below), whose sum is σ = 130156796847. Its totient is φ = 58082962248.

The previous prime is 87127099907. The next prime is 87127099949. The reversal of 87127099929 is 92999072178.

The square root of 87127099929 is 295173.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 86744975625 + 382124304 = 294525^2 + 19548^2 .

It is not a de Polignac number, because 87127099929 - 2¹⁷ = 87126968857 is a prime.

It is a super-2 number, since 2×87127099929² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (87127099949) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 2640159 + ... + 2672955.

Almost surely, 2^87127099929 is an apocalyptic number.

87127099929 is the 295173-rd square number.

87127099929 is the 147587-th centered octagonal number.

It is an amenable number.

87127099929 is a deficient number, since it is larger than the sum of its proper divisors (43029696918).

87127099929 is an frugal number, since it uses more digits than its factorization.

87127099929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65606 (or 32800 counting only the distinct ones).

The product of its (nonzero) digits is 10287648, while the sum is 63.

The spelling of 87127099929 in words is "eighty-seven billion, one hundred twenty-seven million, ninety-nine thousand, nine hundred twenty-nine".