231873617 has 2 divisors, whose sum is σ = 231873618. Its totient is φ = 231873616.

The previous prime is 231873559. The next prime is 231873689. The reversal of 231873617 is 716378132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 200052736 + 31820881 = 14144^2 + 5641^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231873617 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (231873517) 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 as a sum of consecutive naturals, namely, 115936808 + 115936809.

It is an arithmetic number, because the mean of its divisors is an integer number (115936809).

Almost surely, 2^231873617 is an apocalyptic number.

It is an amenable number.

231873617 is a deficient number, since it is larger than the sum of its proper divisors (1).

231873617 is an equidigital number, since it uses as much as digits as its factorization.

231873617 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 42336, while the sum is 38.

The square root of 231873617 is about 15227.3969213389. The cubic root of 231873617 is about 614.3517676814.

The spelling of 231873617 in words is "two hundred thirty-one million, eight hundred seventy-three thousand, six hundred seventeen".