8691961699 has 4 divisors (see below), whose sum is σ = 8789624280. Its totient is φ = 8594299120.

The previous prime is 8691961697. The next prime is 8691961757. The reversal of 8691961699 is 9961691968.

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 8691961699 - 2¹ = 8691961697 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8691961699.

It is not an unprimeable number, because it can be changed into a prime (8691961697) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48831157 + ... + 48831334.

It is an arithmetic number, because the mean of its divisors is an integer number (2197406070).

Almost surely, 2^8691961699 is an apocalyptic number.

8691961699 is a gapful number since it is divisible by the number (89) formed by its first and last digit.

8691961699 is a deficient number, since it is larger than the sum of its proper divisors (97662581).

8691961699 is an equidigital number, since it uses as much as digits as its factorization.

8691961699 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97662580.

The product of its digits is 11337408, while the sum is 64.

The square root of 8691961699 is about 93230.6907568532. The cubic root of 8691961699 is about 2056.0764936282.

The spelling of 8691961699 in words is "eight billion, six hundred ninety-one million, nine hundred sixty-one thousand, six hundred ninety-nine".