1426673657 has 2 divisors, whose sum is σ = 1426673658. Its totient is φ = 1426673656.

The previous prime is 1426673629. The next prime is 1426673671. The reversal of 1426673657 is 7563766241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 836135056 + 590538601 = 28916^2 + 24301^2 .

It is an emirp because it is prime and its reverse (7563766241) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1426673657 - 2⁸ = 1426673401 is a prime.

It is not a weakly prime, because it can be changed into another prime (1426673617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 713336828 + 713336829.

It is an arithmetic number, because the mean of its divisors is an integer number (713336829).

Almost surely, 2^1426673657 is an apocalyptic number.

It is an amenable number.

1426673657 is a deficient number, since it is larger than the sum of its proper divisors (1).

1426673657 is an equidigital number, since it uses as much as digits as its factorization.

1426673657 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1270080, while the sum is 47.

The square root of 1426673657 is about 37771.3337995893. Note that the first 3 decimals coincide. The cubic root of 1426673657 is about 1125.7489418260.

The spelling of 1426673657 in words is "one billion, four hundred twenty-six million, six hundred seventy-three thousand, six hundred fifty-seven".