1292494979 has 2 divisors, whose sum is σ = 1292494980. Its totient is φ = 1292494978.

The previous prime is 1292494967. The next prime is 1292494981. The reversal of 1292494979 is 9794942921.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1292494979 - 2¹² = 1292490883 is a prime.

Together with 1292494981, 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 (1292494909) 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, 646247489 + 646247490.

It is an arithmetic number, because the mean of its divisors is an integer number (646247490).

Almost surely, 2^1292494979 is an apocalyptic number.

1292494979 is a deficient number, since it is larger than the sum of its proper divisors (1).

1292494979 is an equidigital number, since it uses as much as digits as its factorization.

1292494979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2939328, while the sum is 56.

The square root of 1292494979 is about 35951.2861939597. The cubic root of 1292494979 is about 1089.2885908603.

The spelling of 1292494979 in words is "one billion, two hundred ninety-two million, four hundred ninety-four thousand, nine hundred seventy-nine".