87201172 has 6 divisors (see below), whose sum is σ = 152602058. Its totient is φ = 43600584.

The previous prime is 87201161. The next prime is 87201187. The reversal of 87201172 is 27110278.

It can be written as a sum of positive squares in only one way, i.e., 86936976 + 264196 = 9324^2 + 514^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 87201172.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10900143 + ... + 10900150.

Almost surely, 2^87201172 is an apocalyptic number.

It is an amenable number.

87201172 is a deficient number, since it is larger than the sum of its proper divisors (65400886).

87201172 is a wasteful number, since it uses less digits than its factorization.

87201172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21800297 (or 21800295 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 28.

The square root of 87201172 is about 9338.1567774374. The cubic root of 87201172 is about 443.4460328680.

The spelling of 87201172 in words is "eighty-seven million, two hundred one thousand, one hundred seventy-two".