53443613 has 2 divisors, whose sum is σ = 53443614. Its totient is φ = 53443612.

The previous prime is 53443609. The next prime is 53443619. The reversal of 53443613 is 31634435.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49042009 + 4401604 = 7003^2 + 2098^2 .

It is a cyclic number.

It is not a de Polignac number, because 53443613 - 2² = 53443609 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 (53443619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26721806 + 26721807.

It is an arithmetic number, because the mean of its divisors is an integer number (26721807).

Almost surely, 2^53443613 is an apocalyptic number.

It is an amenable number.

53443613 is a deficient number, since it is larger than the sum of its proper divisors (1).

53443613 is an equidigital number, since it uses as much as digits as its factorization.

53443613 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12960, while the sum is 29.

The square root of 53443613 is about 7310.5138670274. The cubic root of 53443613 is about 376.6736757861.

The spelling of 53443613 in words is "fifty-three million, four hundred forty-three thousand, six hundred thirteen".