1390338923663 has 4 divisors (see below), whose sum is σ = 1422672387048. Its totient is φ = 1358005460280.

The previous prime is 1390338923653. The next prime is 1390338923671. The reversal of 1390338923663 is 3663298330931.

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

It is a cyclic number.

It is not a de Polignac number, because 1390338923663 - 2¹⁰ = 1390338922639 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1390338923599 and 1390338923608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1390338923653) 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, 16166731628 + ... + 16166731713.

It is an arithmetic number, because the mean of its divisors is an integer number (355668096762).

Almost surely, 2^{1390338923663} is an apocalyptic number.

1390338923663 is a deficient number, since it is larger than the sum of its proper divisors (32333463385).

1390338923663 is an equidigital number, since it uses as much as digits as its factorization.

1390338923663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32333463384.

The product of its (nonzero) digits is 11337408, while the sum is 56.

The spelling of 1390338923663 in words is "one trillion, three hundred ninety billion, three hundred thirty-eight million, nine hundred twenty-three thousand, six hundred sixty-three".