28953191 has 2 divisors, whose sum is σ = 28953192. Its totient is φ = 28953190.

The previous prime is 28953181. The next prime is 28953217. The reversal of 28953191 is 19135982.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28953191 - 2²² = 24758887 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28953181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14476595 + 14476596.

It is an arithmetic number, because the mean of its divisors is an integer number (14476596).

Almost surely, 2^28953191 is an apocalyptic number.

28953191 is a deficient number, since it is larger than the sum of its proper divisors (1).

28953191 is an equidigital number, since it uses as much as digits as its factorization.

28953191 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19440, while the sum is 38.

The square root of 28953191 is about 5380.8169454089. The cubic root of 28953191 is about 307.0662923116.

The spelling of 28953191 in words is "twenty-eight million, nine hundred fifty-three thousand, one hundred ninety-one".