56243389 has 2 divisors, whose sum is σ = 56243390. Its totient is φ = 56243388.

The previous prime is 56243359. The next prime is 56243399. The reversal of 56243389 is 98334265.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47032164 + 9211225 = 6858^2 + 3035^2 .

It is a cyclic number.

It is not a de Polignac number, because 56243389 - 2⁵ = 56243357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56243309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28121694 + 28121695.

It is an arithmetic number, because the mean of its divisors is an integer number (28121695).

Almost surely, 2^56243389 is an apocalyptic number.

It is an amenable number.

56243389 is a deficient number, since it is larger than the sum of its proper divisors (1).

56243389 is an equidigital number, since it uses as much as digits as its factorization.

56243389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 155520, while the sum is 40.

The square root of 56243389 is about 7499.5592537162. The cubic root of 56243389 is about 383.1397050260.

The spelling of 56243389 in words is "fifty-six million, two hundred forty-three thousand, three hundred eighty-nine".