53993493217 has 2 divisors, whose sum is σ = 53993493218. Its totient is φ = 53993493216.

The previous prime is 53993493179. The next prime is 53993493289. The reversal of 53993493217 is 71239439935.

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., 43112708496 + 10880784721 = 207636^2 + 104311^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53993493217 is a prime.

It is not a weakly prime, because it can be changed into another prime (53993493317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26996746608 + 26996746609.

It is an arithmetic number, because the mean of its divisors is an integer number (26996746609).

Almost surely, 2^53993493217 is an apocalyptic number.

It is an amenable number.

53993493217 is a deficient number, since it is larger than the sum of its proper divisors (1).

53993493217 is an equidigital number, since it uses as much as digits as its factorization.

53993493217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5511240, while the sum is 55.

The spelling of 53993493217 in words is "fifty-three billion, nine hundred ninety-three million, four hundred ninety-three thousand, two hundred seventeen".