75087689 has 8 divisors (see below), whose sum is σ = 77349000. Its totient is φ = 72838656.

The previous prime is 75087679. The next prime is 75087703. The reversal of 75087689 is 98678057.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 4443664 + 70644025 = 2108^2 + 8405^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 75087689 - 2¹⁶ = 75022153 is a prime.

It is a super-2 number, since 2×75087689² = 11276322078721442, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (75087659) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10187 + ... + 15935.

It is an arithmetic number, because the mean of its divisors is an integer number (9668625).

Almost surely, 2^75087689 is an apocalyptic number.

It is an amenable number.

75087689 is a deficient number, since it is larger than the sum of its proper divisors (2261311).

75087689 is a wasteful number, since it uses less digits than its factorization.

75087689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6139.

The product of its (nonzero) digits is 846720, while the sum is 50.

The square root of 75087689 is about 8665.3152856662. The cubic root of 75087689 is about 421.8806236763.

The spelling of 75087689 in words is "seventy-five million, eighty-seven thousand, six hundred eighty-nine".