4897691809 has 2 divisors, whose sum is σ = 4897691810. Its totient is φ = 4897691808.

The previous prime is 4897691803. The next prime is 4897691819. The reversal of 4897691809 is 9081967984.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2513518225 + 2384173584 = 50135^2 + 48828^2 .

It is a cyclic number.

It is not a de Polignac number, because 4897691809 - 2²¹ = 4895594657 is a prime.

It is not a weakly prime, because it can be changed into another prime (4897691803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2448845904 + 2448845905.

It is an arithmetic number, because the mean of its divisors is an integer number (2448845905).

Almost surely, 2^4897691809 is an apocalyptic number.

It is an amenable number.

4897691809 is a deficient number, since it is larger than the sum of its proper divisors (1).

4897691809 is an equidigital number, since it uses as much as digits as its factorization.

4897691809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7838208, while the sum is 61.

The square root of 4897691809 is about 69983.5109793728. The cubic root of 4897691809 is about 1698.2325123480.

The spelling of 4897691809 in words is "four billion, eight hundred ninety-seven million, six hundred ninety-one thousand, eight hundred nine".