45087689 has 4 divisors (see below), whose sum is σ = 47739924. Its totient is φ = 42435456.

The previous prime is 45087641. The next prime is 45087727. The reversal of 45087689 is 98678054.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 98678054 = 2 ⋅49339027.

It can be written as a sum of positive squares in 2 ways, for example, as 12369289 + 32718400 = 3517^2 + 5720^2 .

It is a cyclic number.

It is not a de Polignac number, because 45087689 - 2²⁰ = 44039113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45087089) 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, 1326092 + ... + 1326125.

It is an arithmetic number, because the mean of its divisors is an integer number (11934981).

Almost surely, 2^45087689 is an apocalyptic number.

It is an amenable number.

45087689 is a deficient number, since it is larger than the sum of its proper divisors (2652235).

45087689 is a wasteful number, since it uses less digits than its factorization.

45087689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2652234.

The product of its (nonzero) digits is 483840, while the sum is 47.

The square root of 45087689 is about 6714.7367036988. The cubic root of 45087689 is about 355.9202178873.

The spelling of 45087689 in words is "forty-five million, eighty-seven thousand, six hundred eighty-nine".