53381693 has 2 divisors, whose sum is σ = 53381694. Its totient is φ = 53381692.

The previous prime is 53381641. The next prime is 53381701. The reversal of 53381693 is 39618335.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32569849 + 20811844 = 5707^2 + 4562^2 .

It is a cyclic number.

It is not a de Polignac number, because 53381693 - 2⁸ = 53381437 is a prime.

It is a Sophie Germain prime.

It is a Chen 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 (53380693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26690846 + 26690847.

It is an arithmetic number, because the mean of its divisors is an integer number (26690847).

Almost surely, 2^53381693 is an apocalyptic number.

It is an amenable number.

53381693 is a deficient number, since it is larger than the sum of its proper divisors (1).

53381693 is an equidigital number, since it uses as much as digits as its factorization.

53381693 is an evil number, because the sum of its binary digits is even.

The product of its digits is 58320, while the sum is 38.

The square root of 53381693 is about 7306.2776432326. The cubic root of 53381693 is about 376.5281476545.

The spelling of 53381693 in words is "fifty-three million, three hundred eighty-one thousand, six hundred ninety-three".