28966912409 has 2 divisors, whose sum is σ = 28966912410. Its totient is φ = 28966912408.

The previous prime is 28966912369. The next prime is 28966912433. The reversal of 28966912409 is 90421966982.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24487555225 + 4479357184 = 156485^2 + 66928^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28966912409 is a prime.

It is not a weakly prime, because it can be changed into another prime (28966911409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14483456204 + 14483456205.

It is an arithmetic number, because the mean of its divisors is an integer number (14483456205).

Almost surely, 2^28966912409 is an apocalyptic number.

It is an amenable number.

28966912409 is a deficient number, since it is larger than the sum of its proper divisors (1).

28966912409 is an equidigital number, since it uses as much as digits as its factorization.

28966912409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3359232, while the sum is 56.

The spelling of 28966912409 in words is "twenty-eight billion, nine hundred sixty-six million, nine hundred twelve thousand, four hundred nine".