249147697 has 2 divisors, whose sum is σ = 249147698. Its totient is φ = 249147696.

The previous prime is 249147641. The next prime is 249147761. The reversal of 249147697 is 796741942.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 231161616 + 17986081 = 15204^2 + 4241^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-249147697 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 249147697.

It is not a weakly prime, because it can be changed into another prime (249147637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124573848 + 124573849.

It is an arithmetic number, because the mean of its divisors is an integer number (124573849).

Almost surely, 2^249147697 is an apocalyptic number.

It is an amenable number.

249147697 is a deficient number, since it is larger than the sum of its proper divisors (1).

249147697 is an equidigital number, since it uses as much as digits as its factorization.

249147697 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 762048, while the sum is 49.

The square root of 249147697 is about 15784.4131028049. The cubic root of 249147697 is about 629.2438202028.

The spelling of 249147697 in words is "two hundred forty-nine million, one hundred forty-seven thousand, six hundred ninety-seven".