87641787 has 8 divisors (see below), whose sum is σ = 116952336. Its totient is φ = 58379552.

The previous prime is 87641713. The next prime is 87641797. The reversal of 87641787 is 78714678.

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 87641787 - 2²⁴ = 70864571 is a prime.

It is not an unprimeable number, because it can be changed into a prime (87641797) 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, 7608 + ... + 15269.

It is an arithmetic number, because the mean of its divisors is an integer number (14619042).

Almost surely, 2^87641787 is an apocalyptic number.

87641787 is a deficient number, since it is larger than the sum of its proper divisors (29310549).

87641787 is a wasteful number, since it uses less digits than its factorization.

87641787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24157.

The product of its digits is 526848, while the sum is 48.

The square root of 87641787 is about 9361.7192331323. The cubic root of 87641787 is about 444.1916681203.

The spelling of 87641787 in words is "eighty-seven million, six hundred forty-one thousand, seven hundred eighty-seven".