249970001 has 2 divisors, whose sum is σ = 249970002. Its totient is φ = 249970000.

The previous prime is 249969991. The next prime is 249970043. The reversal of 249970001 is 100079942.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 224970001 + 25000000 = 14999^2 + 5000^2 .

It is a cyclic number.

It is not a de Polignac number, because 249970001 - 2¹⁰ = 249968977 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 249970001.

It is not a weakly prime, because it can be changed into another prime (249970801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124985000 + 124985001.

It is an arithmetic number, because the mean of its divisors is an integer number (124985001).

Almost surely, 2^249970001 is an apocalyptic number.

It is an amenable number.

249970001 is a deficient number, since it is larger than the sum of its proper divisors (1).

249970001 is an equidigital number, since it uses as much as digits as its factorization.

249970001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 249970001 is about 15810.4396207063. The cubic root of 249970001 is about 629.9353263584.

The spelling of 249970001 in words is "two hundred forty-nine million, nine hundred seventy thousand, one".