87375289 has 4 divisors (see below), whose sum is σ = 90388260. Its totient is φ = 84362320.

The previous prime is 87375263. The next prime is 87375307. The reversal of 87375289 is 98257378.

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 50651689 + 36723600 = 7117^2 + 6060^2 .

It is a cyclic number.

It is not a de Polignac number, because 87375289 - 2⁷ = 87375161 is a prime.

It is a super-2 number, since 2×87375289² = 15268882255667042, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (87375259) 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, 1506442 + ... + 1506499.

It is an arithmetic number, because the mean of its divisors is an integer number (22597065).

Almost surely, 2^87375289 is an apocalyptic number.

It is an amenable number.

87375289 is a deficient number, since it is larger than the sum of its proper divisors (3012971).

87375289 is a wasteful number, since it uses less digits than its factorization.

87375289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3012970.

The product of its digits is 846720, while the sum is 49.

The square root of 87375289 is about 9347.4750066529. The cubic root of 87375289 is about 443.7409836428.

The spelling of 87375289 in words is "eighty-seven million, three hundred seventy-five thousand, two hundred eighty-nine".