634023353123 has 4 divisors (see below), whose sum is σ = 634024957008. Its totient is φ = 634021749240.

The previous prime is 634023353101. The next prime is 634023353147. The reversal of 634023353123 is 321353320436.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 634023353123 - 2¹⁸ = 634023090979 is a prime.

It is a super-2 number, since 2×634023353123² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (634023353153) 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, 257978 + ... + 1155248.

It is an arithmetic number, because the mean of its divisors is an integer number (158506239252).

Almost surely, 2^634023353123 is an apocalyptic number.

634023353123 is a deficient number, since it is larger than the sum of its proper divisors (1603885).

634023353123 is an equidigital number, since it uses as much as digits as its factorization.

634023353123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1603884.

The product of its (nonzero) digits is 116640, while the sum is 35.

Adding to 634023353123 its reverse (321353320436), we get a palindrome (955376673559).

The spelling of 634023353123 in words is "six hundred thirty-four billion, twenty-three million, three hundred fifty-three thousand, one hundred twenty-three".