249117601 has 2 divisors, whose sum is σ = 249117602. Its totient is φ = 249117600.

The previous prime is 249117571. The next prime is 249117637. The reversal of 249117601 is 106711942.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 135140625 + 113976976 = 11625^2 + 10676^2 .

It is a cyclic number.

It is not a de Polignac number, because 249117601 - 2¹⁹ = 248593313 is a prime.

It is not a weakly prime, because it can be changed into another prime (249117691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124558800 + 124558801.

It is an arithmetic number, because the mean of its divisors is an integer number (124558801).

Almost surely, 2^249117601 is an apocalyptic number.

It is an amenable number.

249117601 is a deficient number, since it is larger than the sum of its proper divisors (1).

249117601 is an equidigital number, since it uses as much as digits as its factorization.

249117601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 31.

The square root of 249117601 is about 15783.4597284626. The cubic root of 249117601 is about 629.2184825084.

The spelling of 249117601 in words is "two hundred forty-nine million, one hundred seventeen thousand, six hundred one".