268372981 has 2 divisors, whose sum is σ = 268372982. Its totient is φ = 268372980.

The previous prime is 268372939. The next prime is 268372991. The reversal of 268372981 is 189273862.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 152917956 + 115455025 = 12366^2 + 10745^2 .

It is a cyclic number.

It is not a de Polignac number, because 268372981 - 2¹⁵ = 268340213 is a prime.

It is a super-2 number, since 2×268372981² = 144048113861652722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (268372991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134186490 + 134186491.

It is an arithmetic number, because the mean of its divisors is an integer number (134186491).

Almost surely, 2^268372981 is an apocalyptic number.

It is an amenable number.

268372981 is a deficient number, since it is larger than the sum of its proper divisors (1).

268372981 is an equidigital number, since it uses as much as digits as its factorization.

268372981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 290304, while the sum is 46.

The square root of 268372981 is about 16382.0933033602. The cubic root of 268372981 is about 645.0295289247.

The spelling of 268372981 in words is "two hundred sixty-eight million, three hundred seventy-two thousand, nine hundred eighty-one".