512040491 has 2 divisors, whose sum is σ = 512040492. Its totient is φ = 512040490.

The previous prime is 512040461. The next prime is 512040511. The reversal of 512040491 is 194040215.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-512040491 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 512040491.

It is not a weakly prime, because it can be changed into another prime (512040401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 256020245 + 256020246.

It is an arithmetic number, because the mean of its divisors is an integer number (256020246).

Almost surely, 2^512040491 is an apocalyptic number.

512040491 is a deficient number, since it is larger than the sum of its proper divisors (1).

512040491 is an equidigital number, since it uses as much as digits as its factorization.

512040491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 512040491 is about 22628.3117134266. The cubic root of 512040491 is about 800.0210885066.

The spelling of 512040491 in words is "five hundred twelve million, forty thousand, four hundred ninety-one".