262453981 has 2 divisors, whose sum is σ = 262453982. Its totient is φ = 262453980.

The previous prime is 262453979. The next prime is 262454033. The reversal of 262453981 is 189354262.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 260176900 + 2277081 = 16130^2 + 1509^2 .

It is a cyclic number.

It is not a de Polignac number, because 262453981 - 2¹ = 262453979 is a prime.

It is a super-2 number, since 2×262453981² = 137764184285496722, which contains 22 as substring.

Together with 262453979, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (262453951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131226990 + 131226991.

It is an arithmetic number, because the mean of its divisors is an integer number (131226991).

Almost surely, 2^262453981 is an apocalyptic number.

It is an amenable number.

262453981 is a deficient number, since it is larger than the sum of its proper divisors (1).

262453981 is an equidigital number, since it uses as much as digits as its factorization.

262453981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 103680, while the sum is 40.

The square root of 262453981 is about 16200.4315065988. The cubic root of 262453981 is about 640.2521638165.

The spelling of 262453981 in words is "two hundred sixty-two million, four hundred fifty-three thousand, nine hundred eighty-one".