87445541 has 4 divisors (see below), whose sum is σ = 89808972. Its totient is φ = 85082112.

The previous prime is 87445537. The next prime is 87445549. The reversal of 87445541 is 14554478.

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 84456100 + 2989441 = 9190^2 + 1729^2 .

It is a cyclic number.

It is not a de Polignac number, because 87445541 - 2² = 87445537 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 87445495 and 87445504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87445549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1181660 + ... + 1181733.

It is an arithmetic number, because the mean of its divisors is an integer number (22452243).

Almost surely, 2^87445541 is an apocalyptic number.

It is an amenable number.

87445541 is a deficient number, since it is larger than the sum of its proper divisors (2363431).

87445541 is a wasteful number, since it uses less digits than its factorization.

87445541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2363430.

The product of its digits is 89600, while the sum is 38.

The square root of 87445541 is about 9351.2320578627. The cubic root of 87445541 is about 443.8598782061.

The spelling of 87445541 in words is "eighty-seven million, four hundred forty-five thousand, five hundred forty-one".