85403848493 has 2 divisors, whose sum is σ = 85403848494. Its totient is φ = 85403848492.

The previous prime is 85403848489. The next prime is 85403848499. The reversal of 85403848493 is 39484830458.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 85355712649 + 48135844 = 292157^2 + 6938^2 .

It is a cyclic number.

It is not a de Polignac number, because 85403848493 - 2² = 85403848489 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85403848499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42701924246 + 42701924247.

It is an arithmetic number, because the mean of its divisors is an integer number (42701924247).

Almost surely, 2^85403848493 is an apocalyptic number.

It is an amenable number.

85403848493 is a deficient number, since it is larger than the sum of its proper divisors (1).

85403848493 is an equidigital number, since it uses as much as digits as its factorization.

85403848493 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13271040, while the sum is 56.

The spelling of 85403848493 in words is "eighty-five billion, four hundred three million, eight hundred forty-eight thousand, four hundred ninety-three".