345793136921 has 4 divisors (see below), whose sum is σ = 345876404532. Its totient is φ = 345709869312.

The previous prime is 345793136911. The next prime is 345793136939. The reversal of 345793136921 is 129631397543.

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

It can be written as a sum of positive squares in 2 ways, for example, as 112707918400 + 233085218521 = 335720^2 + 482789^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-345793136921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (345793136911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41627576 + ... + 41635881.

It is an arithmetic number, because the mean of its divisors is an integer number (86469101133).

Almost surely, 2^345793136921 is an apocalyptic number.

It is an amenable number.

345793136921 is a deficient number, since it is larger than the sum of its proper divisors (83267611).

345793136921 is an equidigital number, since it uses as much as digits as its factorization.

345793136921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83267610.

The product of its digits is 3674160, while the sum is 53.

The spelling of 345793136921 in words is "three hundred forty-five billion, seven hundred ninety-three million, one hundred thirty-six thousand, nine hundred twenty-one".