242986979 has 2 divisors, whose sum is σ = 242986980. Its totient is φ = 242986978.

The previous prime is 242986949. The next prime is 242986981. The reversal of 242986979 is 979689242.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-242986979 is a prime.

Together with 242986981, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (242986949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121493489 + 121493490.

It is an arithmetic number, because the mean of its divisors is an integer number (121493490).

Almost surely, 2^242986979 is an apocalyptic number.

242986979 is a deficient number, since it is larger than the sum of its proper divisors (1).

242986979 is an equidigital number, since it uses as much as digits as its factorization.

242986979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3919104, while the sum is 56.

The square root of 242986979 is about 15588.0396137552. The cubic root of 242986979 is about 624.0140007200.

The spelling of 242986979 in words is "two hundred forty-two million, nine hundred eighty-six thousand, nine hundred seventy-nine".