249689825939 has 2 divisors, whose sum is σ = 249689825940. Its totient is φ = 249689825938.

The previous prime is 249689825927. The next prime is 249689825989. The reversal of 249689825939 is 939528986942.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-249689825939 is a prime.

It is not a weakly prime, because it can be changed into another prime (249689825909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124844912969 + 124844912970.

It is an arithmetic number, because the mean of its divisors is an integer number (124844912970).

Almost surely, 2^249689825939 is an apocalyptic number.

249689825939 is a deficient number, since it is larger than the sum of its proper divisors (1).

249689825939 is an equidigital number, since it uses as much as digits as its factorization.

249689825939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 604661760, while the sum is 74.

The spelling of 249689825939 in words is "two hundred forty-nine billion, six hundred eighty-nine million, eight hundred twenty-five thousand, nine hundred thirty-nine".