1231014399 has 4 divisors (see below), whose sum is σ = 1641352536. Its totient is φ = 820676264.

The previous prime is 1231014377. The next prime is 1231014439. The reversal of 1231014399 is 9934101321.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9934101321 = 3 ⋅3311367107.

It is a cyclic number.

It is not a de Polignac number, because 1231014399 - 2⁸ = 1231014143 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231014599) 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, 205169064 + ... + 205169069.

It is an arithmetic number, because the mean of its divisors is an integer number (410338134).

Almost surely, 2^1231014399 is an apocalyptic number.

1231014399 is a deficient number, since it is larger than the sum of its proper divisors (410338137).

1231014399 is an equidigital number, since it uses as much as digits as its factorization.

1231014399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410338136.

The product of its (nonzero) digits is 5832, while the sum is 33.

The square root of 1231014399 is about 35085.8147831855. The cubic root of 1231014399 is about 1071.7357331877.

The spelling of 1231014399 in words is "one billion, two hundred thirty-one million, fourteen thousand, three hundred ninety-nine".