275009491 has 2 divisors, whose sum is σ = 275009492. Its totient is φ = 275009490.

The previous prime is 275009429. The next prime is 275009513. The reversal of 275009491 is 194900572.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 275009491 - 2¹¹ = 275007443 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 275009491.

It is not a weakly prime, because it can be changed into another prime (275309491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 137504745 + 137504746.

It is an arithmetic number, because the mean of its divisors is an integer number (137504746).

Almost surely, 2^275009491 is an apocalyptic number.

275009491 is a deficient number, since it is larger than the sum of its proper divisors (1).

275009491 is an equidigital number, since it uses as much as digits as its factorization.

275009491 is an evil number, because the sum of its binary digits is even.

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

The square root of 275009491 is about 16583.4101137251. The cubic root of 275009491 is about 650.3032044993.

The spelling of 275009491 in words is "two hundred seventy-five million, nine thousand, four hundred ninety-one".