86991935 has 4 divisors (see below), whose sum is σ = 104390328. Its totient is φ = 69593544.

The previous prime is 86991913. The next prime is 86991977. The reversal of 86991935 is 53919968.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 86991935 - 2⁶ = 86991871 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8699189 + ... + 8699198.

It is an arithmetic number, because the mean of its divisors is an integer number (26097582).

Almost surely, 2^86991935 is an apocalyptic number.

86991935 is a deficient number, since it is larger than the sum of its proper divisors (17398393).

86991935 is a wasteful number, since it uses less digits than its factorization.

86991935 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17398392.

The product of its digits is 524880, while the sum is 50.

The square root of 86991935 is about 9326.9467136893. The cubic root of 86991935 is about 443.0910696393.

The spelling of 86991935 in words is "eighty-six million, nine hundred ninety-one thousand, nine hundred thirty-five".