19750001 has 2 divisors, whose sum is σ = 19750002. Its totient is φ = 19750000.

The previous prime is 19749991. The next prime is 19750013. The reversal of 19750001 is 10005791.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19149376 + 600625 = 4376^2 + 775^2 .

It is an emirp because it is prime and its reverse (10005791) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19750001 - 2¹⁸ = 19487857 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (19750021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9875000 + 9875001.

It is an arithmetic number, because the mean of its divisors is an integer number (9875001).

Almost surely, 2^19750001 is an apocalyptic number.

It is an amenable number.

19750001 is a deficient number, since it is larger than the sum of its proper divisors (1).

19750001 is an equidigital number, since it uses as much as digits as its factorization.

19750001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 315, while the sum is 23.

The square root of 19750001 is about 4444.0973211666. The cubic root of 19750001 is about 270.3060133496.

Adding to 19750001 its reverse (10005791), we get a palindrome (29755792).

The spelling of 19750001 in words is "nineteen million, seven hundred fifty thousand, one".