231920723 has 4 divisors (see below), whose sum is σ = 237577368. Its totient is φ = 226264080.

The previous prime is 231920683. The next prime is 231920761. The reversal of 231920723 is 327029132.

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 231920723 - 2⁶ = 231920659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231920323) 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, 2828261 + ... + 2828342.

It is an arithmetic number, because the mean of its divisors is an integer number (59394342).

Almost surely, 2^231920723 is an apocalyptic number.

231920723 is a deficient number, since it is larger than the sum of its proper divisors (5656645).

231920723 is an equidigital number, since it uses as much as digits as its factorization.

231920723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5656644.

The product of its (nonzero) digits is 4536, while the sum is 29.

The square root of 231920723 is about 15228.9435943535. The cubic root of 231920723 is about 614.3933674909.

Adding to 231920723 its reverse (327029132), we get a palindrome (558949855).

The spelling of 231920723 in words is "two hundred thirty-one million, nine hundred twenty thousand, seven hundred twenty-three".