28917953 has 2 divisors, whose sum is σ = 28917954. Its totient is φ = 28917952.

The previous prime is 28917949. The next prime is 28918031. The reversal of 28917953 is 35971982.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23931664 + 4986289 = 4892^2 + 2233^2 .

It is a cyclic number.

It is not a de Polignac number, because 28917953 - 2² = 28917949 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (28917253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14458976 + 14458977.

It is an arithmetic number, because the mean of its divisors is an integer number (14458977).

Almost surely, 2^28917953 is an apocalyptic number.

It is an amenable number.

28917953 is a deficient number, since it is larger than the sum of its proper divisors (1).

28917953 is an equidigital number, since it uses as much as digits as its factorization.

28917953 is an evil number, because the sum of its binary digits is even.

The product of its digits is 136080, while the sum is 44.

The square root of 28917953 is about 5377.5415386587. The cubic root of 28917953 is about 306.9416682278.

The spelling of 28917953 in words is "twenty-eight million, nine hundred seventeen thousand, nine hundred fifty-three".