28932947 has 2 divisors, whose sum is σ = 28932948. Its totient is φ = 28932946.

The previous prime is 28932931. The next prime is 28932961. The reversal of 28932947 is 74923982.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28932947 - 2⁴ = 28932931 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 28932898 and 28932907.

It is not a weakly prime, because it can be changed into another prime (28932977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14466473 + 14466474.

It is an arithmetic number, because the mean of its divisors is an integer number (14466474).

Almost surely, 2^28932947 is an apocalyptic number.

28932947 is a deficient number, since it is larger than the sum of its proper divisors (1).

28932947 is an equidigital number, since it uses as much as digits as its factorization.

28932947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 217728, while the sum is 44.

The square root of 28932947 is about 5378.9354894812. The cubic root of 28932947 is about 306.9947089597.

The spelling of 28932947 in words is "twenty-eight million, nine hundred thirty-two thousand, nine hundred forty-seven".