242916491 has 2 divisors, whose sum is σ = 242916492. Its totient is φ = 242916490.

The previous prime is 242916467. The next prime is 242916497. The reversal of 242916491 is 194619242.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-242916491 is a prime.

It is not a weakly prime, because it can be changed into another prime (242916497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121458245 + 121458246.

It is an arithmetic number, because the mean of its divisors is an integer number (121458246).

Almost surely, 2^242916491 is an apocalyptic number.

242916491 is a deficient number, since it is larger than the sum of its proper divisors (1).

242916491 is an equidigital number, since it uses as much as digits as its factorization.

242916491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31104, while the sum is 38.

The square root of 242916491 is about 15585.7784855297. The cubic root of 242916491 is about 623.9536548900.

The spelling of 242916491 in words is "two hundred forty-two million, nine hundred sixteen thousand, four hundred ninety-one".