316521679 has 2 divisors, whose sum is σ = 316521680. Its totient is φ = 316521678.

The previous prime is 316521629. The next prime is 316521697. The reversal of 316521679 is 976125613.

Together with next prime (316521697) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 316521679 - 2¹³ = 316513487 is a prime.

It is equal to p_17097772 and since 316521679 and 17097772 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (316521629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158260839 + 158260840.

It is an arithmetic number, because the mean of its divisors is an integer number (158260840).

Almost surely, 2^316521679 is an apocalyptic number.

316521679 is a deficient number, since it is larger than the sum of its proper divisors (1).

316521679 is an equidigital number, since it uses as much as digits as its factorization.

316521679 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 68040, while the sum is 40.

The square root of 316521679 is about 17791.0561518983. The cubic root of 316521679 is about 681.5030758081.

The spelling of 316521679 in words is "three hundred sixteen million, five hundred twenty-one thousand, six hundred seventy-nine".