262989481 has 2 divisors, whose sum is σ = 262989482. Its totient is φ = 262989480.

The previous prime is 262989479. The next prime is 262989497. The reversal of 262989481 is 184989262.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 213160000 + 49829481 = 14600^2 + 7059^2 .

It is a cyclic number.

It is not a de Polignac number, because 262989481 - 2¹ = 262989479 is a prime.

It is a super-2 number, since 2×262989481² = 138326934233298722, which contains 22 as substring.

Together with 262989479, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (262989421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131494740 + 131494741.

It is an arithmetic number, because the mean of its divisors is an integer number (131494741).

Almost surely, 2^262989481 is an apocalyptic number.

262989481 is the 10257-th centered pentagonal number.

It is an amenable number.

262989481 is a deficient number, since it is larger than the sum of its proper divisors (1).

262989481 is an equidigital number, since it uses as much as digits as its factorization.

262989481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 497664, while the sum is 49.

The square root of 262989481 is about 16216.9504223205. The cubic root of 262989481 is about 640.6873158053.

The spelling of 262989481 in words is "two hundred sixty-two million, nine hundred eighty-nine thousand, four hundred eighty-one".