28669967 has 2 divisors, whose sum is σ = 28669968. Its totient is φ = 28669966.

The previous prime is 28669919. The next prime is 28670003. The reversal of 28669967 is 76996682.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28669967 - 2¹⁶ = 28604431 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 (28669567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14334983 + 14334984.

It is an arithmetic number, because the mean of its divisors is an integer number (14334984).

Almost surely, 2^28669967 is an apocalyptic number.

28669967 is a deficient number, since it is larger than the sum of its proper divisors (1).

28669967 is an equidigital number, since it uses as much as digits as its factorization.

28669967 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1959552, while the sum is 53.

The square root of 28669967 is about 5354.4343305339. The cubic root of 28669967 is about 306.0617550899.

The spelling of 28669967 in words is "twenty-eight million, six hundred sixty-nine thousand, nine hundred sixty-seven".