230495981 has 2 divisors, whose sum is σ = 230495982. Its totient is φ = 230495980.

The previous prime is 230495963. The next prime is 230495987. The reversal of 230495981 is 189594032.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 199515625 + 30980356 = 14125^2 + 5566^2 .

It is a cyclic number.

It is not a de Polignac number, because 230495981 - 2⁶ = 230495917 is a prime.

It is a super-2 number, since 2×230495981² = 106256794514304722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen 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 (230495987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115247990 + 115247991.

It is an arithmetic number, because the mean of its divisors is an integer number (115247991).

Almost surely, 2^230495981 is an apocalyptic number.

It is an amenable number.

230495981 is a deficient number, since it is larger than the sum of its proper divisors (1).

230495981 is an equidigital number, since it uses as much as digits as its factorization.

230495981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 77760, while the sum is 41.

The square root of 230495981 is about 15182.0940913960. The cubic root of 230495981 is about 613.1326627373.

The spelling of 230495981 in words is "two hundred thirty million, four hundred ninety-five thousand, nine hundred eighty-one".