87129055 has 8 divisors (see below), whose sum is σ = 112597632. Its totient is φ = 64341408.

The previous prime is 87129047. The next prime is 87129061. The reversal of 87129055 is 55092178.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 87129055 - 2³ = 87129047 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 670159 + ... + 670288.

It is an arithmetic number, because the mean of its divisors is an integer number (14074704).

Almost surely, 2^87129055 is an apocalyptic number.

87129055 is a deficient number, since it is larger than the sum of its proper divisors (25468577).

87129055 is a wasteful number, since it uses less digits than its factorization.

87129055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1340465.

The product of its (nonzero) digits is 25200, while the sum is 37.

The square root of 87129055 is about 9334.2945635972. The cubic root of 87129055 is about 443.3237530985.

The spelling of 87129055 in words is "eighty-seven million, one hundred twenty-nine thousand, fifty-five".