56169389 has 2 divisors, whose sum is σ = 56169390. Its totient is φ = 56169388.

The previous prime is 56169361. The next prime is 56169401. The reversal of 56169389 is 98396165.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55875625 + 293764 = 7475^2 + 542^2 .

It is a cyclic number.

It is not a de Polignac number, because 56169389 - 2⁸ = 56169133 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56169319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28084694 + 28084695.

It is an arithmetic number, because the mean of its divisors is an integer number (28084695).

Almost surely, 2^56169389 is an apocalyptic number.

It is an amenable number.

56169389 is a deficient number, since it is larger than the sum of its proper divisors (1).

56169389 is an equidigital number, since it uses as much as digits as its factorization.

56169389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 349920, while the sum is 47.

The square root of 56169389 is about 7494.6240065796. The cubic root of 56169389 is about 382.9715976729.

The spelling of 56169389 in words is "fifty-six million, one hundred sixty-nine thousand, three hundred eighty-nine".