86961787 has 8 divisors (see below), whose sum is σ = 94945392. Its totient is φ = 78991200.

The previous prime is 86961773. The next prime is 86961859. The reversal of 86961787 is 78716968.

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 86961787 - 2¹⁵ = 86929019 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86961887) 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, 15393 + ... + 20269.

It is an arithmetic number, because the mean of its divisors is an integer number (11868174).

Almost surely, 2^86961787 is an apocalyptic number.

86961787 is a deficient number, since it is larger than the sum of its proper divisors (7983605).

86961787 is a wasteful number, since it uses less digits than its factorization.

86961787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6509.

The product of its digits is 1016064, while the sum is 52.

The square root of 86961787 is about 9325.3303962916. The cubic root of 86961787 is about 443.0398777175.

The spelling of 86961787 in words is "eighty-six million, nine hundred sixty-one thousand, seven hundred eighty-seven".