986431999 has 8 divisors (see below), whose sum is σ = 1141621760. Its totient is φ = 834809976.

The previous prime is 986431973. The next prime is 986432011. The reversal of 986431999 is 999134689.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 986431999 - 2⁷ = 986431871 is a prime.

It is a super-2 number, since 2×986431999² = 1946096177302272002, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (986431939) 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, 891339 + ... + 892444.

It is an arithmetic number, because the mean of its divisors is an integer number (142702720).

Almost surely, 2^986431999 is an apocalyptic number.

986431999 is a deficient number, since it is larger than the sum of its proper divisors (155189761).

986431999 is a wasteful number, since it uses less digits than its factorization.

986431999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1783869.

The product of its digits is 3779136, while the sum is 58.

The square root of 986431999 is about 31407.5150083543. The cubic root of 986431999 is about 995.4567228929.

The spelling of 986431999 in words is "nine hundred eighty-six million, four hundred thirty-one thousand, nine hundred ninety-nine".