28967947 has 2 divisors, whose sum is σ = 28967948. Its totient is φ = 28967946.

The previous prime is 28967909. The next prime is 28967963. The reversal of 28967947 is 74976982.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28967947 - 2⁷ = 28967819 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28967894 and 28967903.

It is not a weakly prime, because it can be changed into another prime (28967977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14483973 + 14483974.

It is an arithmetic number, because the mean of its divisors is an integer number (14483974).

Almost surely, 2^28967947 is an apocalyptic number.

28967947 is a deficient number, since it is larger than the sum of its proper divisors (1).

28967947 is an equidigital number, since it uses as much as digits as its factorization.

28967947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1524096, while the sum is 52.

The square root of 28967947 is about 5382.1879380044. The cubic root of 28967947 is about 307.1184489193.

The spelling of 28967947 in words is "twenty-eight million, nine hundred sixty-seven thousand, nine hundred forty-seven".