249469081 has 2 divisors, whose sum is σ = 249469082. Its totient is φ = 249469080.

The previous prime is 249469043. The next prime is 249469093. The reversal of 249469081 is 180964942.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 247779081 + 1690000 = 15741^2 + 1300^2 .

It is a cyclic number.

It is not a de Polignac number, because 249469081 - 2⁷ = 249468953 is a prime.

It is a super-2 number, since 2×249469081² = 124469644749969122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (249469681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124734540 + 124734541.

It is an arithmetic number, because the mean of its divisors is an integer number (124734541).

Almost surely, 2^249469081 is an apocalyptic number.

It is an amenable number.

249469081 is a deficient number, since it is larger than the sum of its proper divisors (1).

249469081 is an equidigital number, since it uses as much as digits as its factorization.

249469081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 124416, while the sum is 43.

The square root of 249469081 is about 15794.5902447642. The cubic root of 249469081 is about 629.5142648783.

The spelling of 249469081 in words is "two hundred forty-nine million, four hundred sixty-nine thousand, eighty-one".