233909312345 has 4 divisors (see below), whose sum is σ = 280691174820. Its totient is φ = 187127449872.

The previous prime is 233909312279. The next prime is 233909312401. The reversal of 233909312345 is 543213909332.

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 28257946201 + 205651366144 = 168101^2 + 453488^2 .

It is a cyclic number.

It is not a de Polignac number, because 233909312345 - 2¹² = 233909308249 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 233909312296 and 233909312305.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23390931230 + ... + 23390931239.

It is an arithmetic number, because the mean of its divisors is an integer number (70172793705).

Almost surely, 2^233909312345 is an apocalyptic number.

It is an amenable number.

233909312345 is a deficient number, since it is larger than the sum of its proper divisors (46781862475).

233909312345 is an equidigital number, since it uses as much as digits as its factorization.

233909312345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46781862474.

The product of its (nonzero) digits is 524880, while the sum is 44.

The spelling of 233909312345 in words is "two hundred thirty-three billion, nine hundred nine million, three hundred twelve thousand, three hundred forty-five".