231395093 has 2 divisors, whose sum is σ = 231395094. Its totient is φ = 231395092.

The previous prime is 231395081. The next prime is 231395137. The reversal of 231395093 is 390593132.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 125037124 + 106357969 = 11182^2 + 10313^2 .

It is a cyclic number.

It is not a de Polignac number, because 231395093 - 2¹² = 231390997 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231395393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115697546 + 115697547.

It is an arithmetic number, because the mean of its divisors is an integer number (115697547).

Almost surely, 2^231395093 is an apocalyptic number.

It is an amenable number.

231395093 is a deficient number, since it is larger than the sum of its proper divisors (1).

231395093 is an equidigital number, since it uses as much as digits as its factorization.

231395093 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21870, while the sum is 35.

The square root of 231395093 is about 15211.6762061253. The cubic root of 231395093 is about 613.9288583767.

The spelling of 231395093 in words is "two hundred thirty-one million, three hundred ninety-five thousand, ninety-three".