1231032399 has 8 divisors (see below), whose sum is σ = 1668284592. Its totient is φ = 807234240.

The previous prime is 1231032371. The next prime is 1231032403. The reversal of 1231032399 is 9932301321.

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

It is not a de Polignac number, because 1231032399 - 2⁵ = 1231032367 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231032359) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3363294 + ... + 3363659.

It is an arithmetic number, because the mean of its divisors is an integer number (208535574).

Almost surely, 2^1231032399 is an apocalyptic number.

1231032399 is a deficient number, since it is larger than the sum of its proper divisors (437252193).

1231032399 is an equidigital number, since it uses as much as digits as its factorization.

1231032399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6727017.

The product of its (nonzero) digits is 8748, while the sum is 33.

The square root of 1231032399 is about 35086.0712961711. The cubic root of 1231032399 is about 1071.7409568334.

The spelling of 1231032399 in words is "one billion, two hundred thirty-one million, thirty-two thousand, three hundred ninety-nine".