87150073 has 4 divisors (see below), whose sum is σ = 88794468. Its totient is φ = 85505680.

The previous prime is 87150071. The next prime is 87150097. The reversal of 87150073 is 37005178.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 73222249 + 13927824 = 8557^2 + 3732^2 .

It is a cyclic number.

It is not a de Polignac number, because 87150073 - 2¹ = 87150071 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87150071) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 822118 + ... + 822223.

It is an arithmetic number, because the mean of its divisors is an integer number (22198617).

Almost surely, 2^87150073 is an apocalyptic number.

It is an amenable number.

87150073 is a deficient number, since it is larger than the sum of its proper divisors (1644395).

87150073 is a wasteful number, since it uses less digits than its factorization.

87150073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1644394.

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

The square root of 87150073 is about 9335.4203440445. The cubic root of 87150073 is about 443.3593976548.

The spelling of 87150073 in words is "eighty-seven million, one hundred fifty thousand, seventy-three".