1389812464723 has 4 divisors (see below), whose sum is σ = 1450239093648. Its totient is φ = 1329385835800.

The previous prime is 1389812464699. The next prime is 1389812464751. The reversal of 1389812464723 is 3274642189831.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1389812464723 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1389812464793) 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, 30213314428 + ... + 30213314473.

It is an arithmetic number, because the mean of its divisors is an integer number (362559773412).

Almost surely, 2^{1389812464723} is an apocalyptic number.

1389812464723 is a deficient number, since it is larger than the sum of its proper divisors (60426628925).

1389812464723 is an equidigital number, since it uses as much as digits as its factorization.

1389812464723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60426628924.

The product of its digits is 13934592, while the sum is 58.

The spelling of 1389812464723 in words is "one trillion, three hundred eighty-nine billion, eight hundred twelve million, four hundred sixty-four thousand, seven hundred twenty-three".