3953389517923 has 4 divisors (see below), whose sum is σ = 3953944698408. Its totient is φ = 3952834337440.

The previous prime is 3953389517897. The next prime is 3953389517929. The reversal of 3953389517923 is 3297159833593.

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 3953389517923 - 2¹⁷ = 3953389386851 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3953389517929) 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, 277579561 + ... + 277593802.

It is an arithmetic number, because the mean of its divisors is an integer number (988486174602).

Almost surely, 2^{3953389517923} is an apocalyptic number.

3953389517923 is a deficient number, since it is larger than the sum of its proper divisors (555180485).

3953389517923 is an equidigital number, since it uses as much as digits as its factorization.

3953389517923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 555180484.

The product of its digits is 165337200, while the sum is 67.

The spelling of 3953389517923 in words is "three trillion, nine hundred fifty-three billion, three hundred eighty-nine million, five hundred seventeen thousand, nine hundred twenty-three".