231906479 has 4 divisors (see below), whose sum is σ = 265035984. Its totient is φ = 198776976.

The previous prime is 231906463. The next prime is 231906481. The reversal of 231906479 is 974609132.

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 231906479 - 2⁴ = 231906463 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231986479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16564742 + ... + 16564755.

It is an arithmetic number, because the mean of its divisors is an integer number (66258996).

Almost surely, 2^231906479 is an apocalyptic number.

231906479 is a deficient number, since it is larger than the sum of its proper divisors (33129505).

231906479 is an equidigital number, since it uses as much as digits as its factorization.

231906479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33129504.

The product of its (nonzero) digits is 81648, while the sum is 41.

The square root of 231906479 is about 15228.4759250557. The cubic root of 231906479 is about 614.3807890572.

The spelling of 231906479 in words is "two hundred thirty-one million, nine hundred six thousand, four hundred seventy-nine".