1389458549831 has 12 divisors (see below), whose sum is σ = 1593658533936. Its totient is φ = 1208224823520.

The previous prime is 1389458549789. The next prime is 1389458549839.

1389458549831 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 1389458549831 - 2²⁶ = 1389391440967 is a prime.

It is a super-2 number, since 2×1389458549831² (a number of 25 digits) 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 (1389458549839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 249630446 + ... + 249636011.

It is an arithmetic number, because the mean of its divisors is an integer number (132804877828).

Almost surely, 2^{1389458549831} is an apocalyptic number.

1389458549831 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1389458549831 is a deficient number, since it is larger than the sum of its proper divisors (204199984105).

1389458549831 is a wasteful number, since it uses less digits than its factorization.

1389458549831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499266502 (or 499266491 counting only the distinct ones).

The product of its digits is 149299200, while the sum is 68.

The spelling of 1389458549831 in words is "one trillion, three hundred eighty-nine billion, four hundred fifty-eight million, five hundred forty-nine thousand, eight hundred thirty-one".