28941001 has 2 divisors, whose sum is σ = 28941002. Its totient is φ = 28941000.

The previous prime is 28940999. The next prime is 28941007. The reversal of 28941001 is 10014982.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27248400 + 1692601 = 5220^2 + 1301^2 .

It is a cyclic number.

It is not a de Polignac number, because 28941001 - 2¹ = 28940999 is a prime.

Together with 28940999, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (28941007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14470500 + 14470501.

It is an arithmetic number, because the mean of its divisors is an integer number (14470501).

Almost surely, 2^28941001 is an apocalyptic number.

It is an amenable number.

28941001 is a deficient number, since it is larger than the sum of its proper divisors (1).

28941001 is an equidigital number, since it uses as much as digits as its factorization.

28941001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 28941001 is about 5379.6840985322. The cubic root of 28941001 is about 307.0231921280.

Adding to 28941001 its reverse (10014982), we get a palindrome (38955983).

The spelling of 28941001 in words is "twenty-eight million, nine hundred forty-one thousand, one".