20170679 has 2 divisors, whose sum is σ = 20170680. Its totient is φ = 20170678.

The previous prime is 20170673. The next prime is 20170697. The reversal of 20170679 is 97607102.

Together with next prime (20170697) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20170679 - 2⁴ = 20170663 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20170673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10085339 + 10085340.

It is an arithmetic number, because the mean of its divisors is an integer number (10085340).

Almost surely, 2^20170679 is an apocalyptic number.

20170679 is a deficient number, since it is larger than the sum of its proper divisors (1).

20170679 is an equidigital number, since it uses as much as digits as its factorization.

20170679 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5292, while the sum is 32.

The square root of 20170679 is about 4491.1779078545. The cubic root of 20170679 is about 272.2117323059.

The spelling of 20170679 in words is "twenty million, one hundred seventy thousand, six hundred seventy-nine".