249263576897 has 2 divisors, whose sum is σ = 249263576898. Its totient is φ = 249263576896.

The previous prime is 249263576857. The next prime is 249263576927. The reversal of 249263576897 is 798675362942.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 161739904561 + 87523672336 = 402169^2 + 295844^2 .

It is a cyclic number.

It is not a de Polignac number, because 249263576897 - 2⁸ = 249263576641 is a prime.

It is not a weakly prime, because it can be changed into another prime (249263576857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124631788448 + 124631788449.

It is an arithmetic number, because the mean of its divisors is an integer number (124631788449).

Almost surely, 2^249263576897 is an apocalyptic number.

It is an amenable number.

249263576897 is a deficient number, since it is larger than the sum of its proper divisors (1).

249263576897 is an equidigital number, since it uses as much as digits as its factorization.

249263576897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 274337280, while the sum is 68.

The spelling of 249263576897 in words is "two hundred forty-nine billion, two hundred sixty-three million, five hundred seventy-six thousand, eight hundred ninety-seven".