249494591 has 2 divisors, whose sum is σ = 249494592. Its totient is φ = 249494590.

The previous prime is 249494587. The next prime is 249494617. The reversal of 249494591 is 195494942.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 249494591 - 2² = 249494587 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (249494521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124747295 + 124747296.

It is an arithmetic number, because the mean of its divisors is an integer number (124747296).

Almost surely, 2^249494591 is an apocalyptic number.

249494591 is a deficient number, since it is larger than the sum of its proper divisors (1).

249494591 is an equidigital number, since it uses as much as digits as its factorization.

249494591 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 466560, while the sum is 47.

The square root of 249494591 is about 15795.3977791001. The cubic root of 249494591 is about 629.5357215942.

The spelling of 249494591 in words is "two hundred forty-nine million, four hundred ninety-four thousand, five hundred ninety-one".