28903573 has 2 divisors, whose sum is σ = 28903574. Its totient is φ = 28903572.

The previous prime is 28903561. The next prime is 28903583. The reversal of 28903573 is 37530982.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22638564 + 6265009 = 4758^2 + 2503^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28903573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28903513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14451786 + 14451787.

It is an arithmetic number, because the mean of its divisors is an integer number (14451787).

Almost surely, 2^28903573 is an apocalyptic number.

It is an amenable number.

28903573 is a deficient number, since it is larger than the sum of its proper divisors (1).

28903573 is an equidigital number, since it uses as much as digits as its factorization.

28903573 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 45360, while the sum is 37.

The square root of 28903573 is about 5376.2043301943. The cubic root of 28903573 is about 306.8907822723.

The spelling of 28903573 in words is "twenty-eight million, nine hundred three thousand, five hundred seventy-three".