249387999997 has 2 divisors, whose sum is σ = 249387999998. Its totient is φ = 249387999996.

The previous prime is 249387999989. The next prime is 249388000051. The reversal of 249387999997 is 799999783942.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 214381964196 + 35006035801 = 463014^2 + 187099^2 .

It is a cyclic number.

It is not a de Polignac number, because 249387999997 - 2³ = 249387999989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (249387949997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124693999998 + 124693999999.

It is an arithmetic number, because the mean of its divisors is an integer number (124693999999).

Almost surely, 2^249387999997 is an apocalyptic number.

It is an amenable number.

249387999997 is a deficient number, since it is larger than the sum of its proper divisors (1).

249387999997 is an equidigital number, since it uses as much as digits as its factorization.

249387999997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4999796928, while the sum is 85.

The spelling of 249387999997 in words is "two hundred forty-nine billion, three hundred eighty-seven million, nine hundred ninety-nine thousand, nine hundred ninety-seven".