1656906133 has 2 divisors, whose sum is σ = 1656906134. Its totient is φ = 1656906132.

The previous prime is 1656906079. The next prime is 1656906149. The reversal of 1656906133 is 3316096561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 969575044 + 687331089 = 31138^2 + 26217^2 .

It is an emirp because it is prime and its reverse (3316096561) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1656906133 - 2²⁵ = 1623351701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1656916133) 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, 828453066 + 828453067.

It is an arithmetic number, because the mean of its divisors is an integer number (828453067).

Almost surely, 2^1656906133 is an apocalyptic number.

It is an amenable number.

1656906133 is a deficient number, since it is larger than the sum of its proper divisors (1).

1656906133 is an equidigital number, since it uses as much as digits as its factorization.

1656906133 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 87480, while the sum is 40.

The square root of 1656906133 is about 40705.1118779939. Note that the first 3 decimals coincide. The cubic root of 1656906133 is about 1183.3120901739.

The spelling of 1656906133 in words is "one billion, six hundred fifty-six million, nine hundred six thousand, one hundred thirty-three".