87806545 has 8 divisors (see below), whose sum is σ = 105474600. Its totient is φ = 70174080.

The previous prime is 87806527. The next prime is 87806557. The reversal of 87806545 is 54560878.

It can be written as a sum of positive squares in 4 ways, for example, as 51710481 + 36096064 = 7191^2 + 6008^2 .

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

It is not a de Polignac number, because 87806545 - 2⁷ = 87806417 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3126 + ... + 13615.

It is an arithmetic number, because the mean of its divisors is an integer number (13184325).

Almost surely, 2^87806545 is an apocalyptic number.

It is an amenable number.

87806545 is a deficient number, since it is larger than the sum of its proper divisors (17668055).

87806545 is a wasteful number, since it uses less digits than its factorization.

87806545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17795.

The product of its (nonzero) digits is 268800, while the sum is 43.

The square root of 87806545 is about 9370.5146603588. The cubic root of 87806545 is about 444.4698395327.

The spelling of 87806545 in words is "eighty-seven million, eight hundred six thousand, five hundred forty-five".