87172700 has 18 divisors (see below), whose sum is σ = 189164976. Its totient is φ = 34869040.

The previous prime is 87172699. The next prime is 87172717. The reversal of 87172700 is 727178.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 435764 + ... + 435963.

Almost surely, 2^87172700 is an apocalyptic number.

It is an amenable number.

87172700 is an abundant number, since it is smaller than the sum of its proper divisors (101992276).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

87172700 is a wasteful number, since it uses less digits than its factorization.

87172700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 871741 (or 871734 counting only the distinct ones).

The product of its (nonzero) digits is 5488, while the sum is 32.

The square root of 87172700 is about 9336.6321551189. The cubic root of 87172700 is about 443.3977645189.

Adding to 87172700 its reverse (727178), we get a palindrome (87899878).

The spelling of 87172700 in words is "eighty-seven million, one hundred seventy-two thousand, seven hundred".