85561387 has 8 divisors (see below), whose sum is σ = 87310080. Its totient is φ = 83822760.

The previous prime is 85561363. The next prime is 85561393. The reversal of 85561387 is 78316558.

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 85561387 - 2¹¹ = 85559339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85561337) 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 7 ways as a sum of consecutive naturals, for example, 16018 + ... + 20680.

It is an arithmetic number, because the mean of its divisors is an integer number (10913760).

Almost surely, 2^85561387 is an apocalyptic number.

85561387 is a deficient number, since it is larger than the sum of its proper divisors (1748693).

85561387 is a wasteful number, since it uses less digits than its factorization.

85561387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5033.

The product of its digits is 201600, while the sum is 43.

The square root of 85561387 is about 9249.9398376422. The cubic root of 85561387 is about 440.6488138094.

The spelling of 85561387 in words is "eighty-five million, five hundred sixty-one thousand, three hundred eighty-seven".