19275661 has 2 divisors, whose sum is σ = 19275662. Its totient is φ = 19275660.

The previous prime is 19275643. The next prime is 19275677. The reversal of 19275661 is 16657291.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18438436 + 837225 = 4294^2 + 915^2 .

It is a cyclic number.

It is not a de Polignac number, because 19275661 - 2⁵ = 19275629 is a prime.

It is a super-2 number, since 2×19275661² = 743102213973842, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 19275661.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19275601) 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, 9637830 + 9637831.

It is an arithmetic number, because the mean of its divisors is an integer number (9637831).

Almost surely, 2^19275661 is an apocalyptic number.

It is an amenable number.

19275661 is a deficient number, since it is larger than the sum of its proper divisors (1).

19275661 is an equidigital number, since it uses as much as digits as its factorization.

19275661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22680, while the sum is 37.

The square root of 19275661 is about 4390.4055621320. The cubic root of 19275661 is about 268.1244548939.

The spelling of 19275661 in words is "nineteen million, two hundred seventy-five thousand, six hundred sixty-one".