249924091 has 2 divisors, whose sum is σ = 249924092. Its totient is φ = 249924090.

The previous prime is 249924079. The next prime is 249924109. The reversal of 249924091 is 190429942.

Together with next prime (249924109) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 249924091 - 2¹⁹ = 249399803 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (249924071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124962045 + 124962046.

It is an arithmetic number, because the mean of its divisors is an integer number (124962046).

Almost surely, 2^249924091 is an apocalyptic number.

249924091 is a deficient number, since it is larger than the sum of its proper divisors (1).

249924091 is an equidigital number, since it uses as much as digits as its factorization.

249924091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46656, while the sum is 40.

The square root of 249924091 is about 15808.9876652492. The cubic root of 249924091 is about 629.8967589285.

The spelling of 249924091 in words is "two hundred forty-nine million, nine hundred twenty-four thousand, ninety-one".