268953989 has 2 divisors, whose sum is σ = 268953990. Its totient is φ = 268953988.

The previous prime is 268953977. The next prime is 268954039. The reversal of 268953989 is 989359862.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 184497889 + 84456100 = 13583^2 + 9190^2 .

It is a cyclic number.

It is not a de Polignac number, because 268953989 - 2¹⁶ = 268888453 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (268953929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134476994 + 134476995.

It is an arithmetic number, because the mean of its divisors is an integer number (134476995).

Almost surely, 2^268953989 is an apocalyptic number.

It is an amenable number.

268953989 is a deficient number, since it is larger than the sum of its proper divisors (1).

268953989 is an equidigital number, since it uses as much as digits as its factorization.

268953989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8398080, while the sum is 59.

The square root of 268953989 is about 16399.8167367809. The cubic root of 268953989 is about 645.4946741019.

The spelling of 268953989 in words is "two hundred sixty-eight million, nine hundred fifty-three thousand, nine hundred eighty-nine".