53279813693 has 2 divisors, whose sum is σ = 53279813694. Its totient is φ = 53279813692.

The previous prime is 53279813669. The next prime is 53279813701. The reversal of 53279813693 is 39631897235.

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., 50076593284 + 3203220409 = 223778^2 + 56597^2 .

It is a cyclic number.

It is not a de Polignac number, because 53279813693 - 2¹⁶ = 53279748157 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 (53279813663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26639906846 + 26639906847.

It is an arithmetic number, because the mean of its divisors is an integer number (26639906847).

Almost surely, 2^53279813693 is an apocalyptic number.

It is an amenable number.

53279813693 is a deficient number, since it is larger than the sum of its proper divisors (1).

53279813693 is an equidigital number, since it uses as much as digits as its factorization.

53279813693 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7348320, while the sum is 56.

The spelling of 53279813693 in words is "fifty-three billion, two hundred seventy-nine million, eight hundred thirteen thousand, six hundred ninety-three".