22001669 has 2 divisors, whose sum is σ = 22001670. Its totient is φ = 22001668.

The previous prime is 22001659. The next prime is 22001699. The reversal of 22001669 is 96610022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17430625 + 4571044 = 4175^2 + 2138^2 .

It is a cyclic number.

It is not a de Polignac number, because 22001669 - 2⁴ = 22001653 is a prime.

It is a super-2 number, since 2×22001669² = 968146877571122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22001659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11000834 + 11000835.

It is an arithmetic number, because the mean of its divisors is an integer number (11000835).

Almost surely, 2^22001669 is an apocalyptic number.

It is an amenable number.

22001669 is a deficient number, since it is larger than the sum of its proper divisors (1).

22001669 is an equidigital number, since it uses as much as digits as its factorization.

22001669 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 22001669 is about 4690.5936724470. The cubic root of 22001669 is about 280.2110186495.

The spelling of 22001669 in words is "twenty-two million, one thousand, six hundred sixty-nine".