1973135423 has 4 divisors (see below), whose sum is σ = 2255011920. Its totient is φ = 1691258928.

The previous prime is 1973135419. The next prime is 1973135449. The reversal of 1973135423 is 3245313791.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3245313791 = 19 ⋅170805989.

It is a cyclic number.

It is not a de Polignac number, because 1973135423 - 2² = 1973135419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1973131423) 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 3 ways as a sum of consecutive naturals, for example, 140938238 + ... + 140938251.

It is an arithmetic number, because the mean of its divisors is an integer number (563752980).

Almost surely, 2^1973135423 is an apocalyptic number.

1973135423 is a deficient number, since it is larger than the sum of its proper divisors (281876497).

1973135423 is an equidigital number, since it uses as much as digits as its factorization.

1973135423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281876496.

The product of its digits is 68040, while the sum is 38.

The square root of 1973135423 is about 44419.9890027001. The cubic root of 1973135423 is about 1254.2543939184.

The spelling of 1973135423 in words is "one billion, nine hundred seventy-three million, one hundred thirty-five thousand, four hundred twenty-three".