28949951963 has 2 divisors, whose sum is σ = 28949951964. Its totient is φ = 28949951962.

The previous prime is 28949951959. The next prime is 28949952007. The reversal of 28949951963 is 36915994982.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28949951963 - 2² = 28949951959 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28949951963.

It is not a weakly prime, because it can be changed into another prime (28949951923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14474975981 + 14474975982.

It is an arithmetic number, because the mean of its divisors is an integer number (14474975982).

Almost surely, 2^28949951963 is an apocalyptic number.

28949951963 is a deficient number, since it is larger than the sum of its proper divisors (1).

28949951963 is an equidigital number, since it uses as much as digits as its factorization.

28949951963 is an evil number, because the sum of its binary digits is even.

The product of its digits is 37791360, while the sum is 65.

The spelling of 28949951963 in words is "twenty-eight billion, nine hundred forty-nine million, nine hundred fifty-one thousand, nine hundred sixty-three".