20170669 has 2 divisors, whose sum is σ = 20170670. Its totient is φ = 20170668.

The previous prime is 20170663. The next prime is 20170673. The reversal of 20170669 is 96607102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15697444 + 4473225 = 3962^2 + 2115^2 .

It is a cyclic number.

It is not a de Polignac number, because 20170669 - 2⁵ = 20170637 is a prime.

It is a super-2 number, since 2×20170669² = 813711775815122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20170669.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20170663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10085334 + 10085335.

It is an arithmetic number, because the mean of its divisors is an integer number (10085335).

Almost surely, 2^20170669 is an apocalyptic number.

It is an amenable number.

20170669 is a deficient number, since it is larger than the sum of its proper divisors (1).

20170669 is an equidigital number, since it uses as much as digits as its factorization.

20170669 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 20170669 is about 4491.1767945606. The cubic root of 20170669 is about 272.2116873212.

The spelling of 20170669 in words is "twenty million, one hundred seventy thousand, six hundred sixty-nine".