986067991 has 4 divisors (see below), whose sum is σ = 986153800. Its totient is φ = 985982184.

The previous prime is 986067923. The next prime is 986068007. The reversal of 986067991 is 199760689.

986067991 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 986067991 - 2²¹ = 983970839 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (986067911) 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, 22401 + ... + 49738.

It is an arithmetic number, because the mean of its divisors is an integer number (246538450).

Almost surely, 2^986067991 is an apocalyptic number.

986067991 is a deficient number, since it is larger than the sum of its proper divisors (85809).

986067991 is a wasteful number, since it uses less digits than its factorization.

986067991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85808.

The product of its (nonzero) digits is 1469664, while the sum is 55.

The square root of 986067991 is about 31401.7195548269. The cubic root of 986067991 is about 995.3342617428.

The spelling of 986067991 in words is "nine hundred eighty-six million, sixty-seven thousand, nine hundred ninety-one".