87137500 has 36 divisors (see below), whose sum is σ = 190628424. Its totient is φ = 34850000.

The previous prime is 87137471. The next prime is 87137503. The reversal of 87137500 is 573178.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87137503) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9015 + ... + 15985.

It is an arithmetic number, because the mean of its divisors is an integer number (5295234).

Almost surely, 2^87137500 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 87137500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95314212).

87137500 is an abundant number, since it is smaller than the sum of its proper divisors (103490924).

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

87137500 is an equidigital number, since it uses as much as digits as its factorization.

87137500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7000 (or 6978 counting only the distinct ones).

The product of its (nonzero) digits is 5880, while the sum is 31.

The square root of 87137500 is about 9334.7469167621. The cubic root of 87137500 is about 443.3380757151.

The spelling of 87137500 in words is "eighty-seven million, one hundred thirty-seven thousand, five hundred".