28976947 has 2 divisors, whose sum is σ = 28976948. Its totient is φ = 28976946.

The previous prime is 28976933. The next prime is 28976953. The reversal of 28976947 is 74967982.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28976947 - 2²³ = 20588339 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28976894 and 28976903.

It is not a weakly prime, because it can be changed into another prime (28976917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14488473 + 14488474.

It is an arithmetic number, because the mean of its divisors is an integer number (14488474).

Almost surely, 2^28976947 is an apocalyptic number.

28976947 is a deficient number, since it is larger than the sum of its proper divisors (1).

28976947 is an equidigital number, since it uses as much as digits as its factorization.

28976947 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 28976947 is about 5383.0239642788. The cubic root of 28976947 is about 307.1502516544.

The spelling of 28976947 in words is "twenty-eight million, nine hundred seventy-six thousand, nine hundred forty-seven".