28969669 has 2 divisors, whose sum is σ = 28969670. Its totient is φ = 28969668.

The previous prime is 28969663. The next prime is 28969709. The reversal of 28969669 is 96696982.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23961025 + 5008644 = 4895^2 + 2238^2 .

It is a cyclic number.

It is not a de Polignac number, because 28969669 - 2⁷ = 28969541 is a prime.

It is a super-2 number, since 2×28969669² = 1678483443939122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28969663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14484834 + 14484835.

It is an arithmetic number, because the mean of its divisors is an integer number (14484835).

Almost surely, 2^28969669 is an apocalyptic number.

28969669 is the 3108-th hex number.

It is an amenable number.

28969669 is a deficient number, since it is larger than the sum of its proper divisors (1).

28969669 is an equidigital number, since it uses as much as digits as its factorization.

28969669 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2519424, while the sum is 55.

The square root of 28969669 is about 5382.3479077444. The cubic root of 28969669 is about 307.1245343521.

The spelling of 28969669 in words is "twenty-eight million, nine hundred sixty-nine thousand, six hundred sixty-nine".