56421593 has 2 divisors, whose sum is σ = 56421594. Its totient is φ = 56421592.

The previous prime is 56421577. The next prime is 56421613. The reversal of 56421593 is 39512465.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56370064 + 51529 = 7508^2 + 227^2 .

It is a cyclic number.

It is not a de Polignac number, because 56421593 - 2⁴ = 56421577 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (56421503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28210796 + 28210797.

It is an arithmetic number, because the mean of its divisors is an integer number (28210797).

Almost surely, 2^56421593 is an apocalyptic number.

It is an amenable number.

56421593 is a deficient number, since it is larger than the sum of its proper divisors (1).

56421593 is an equidigital number, since it uses as much as digits as its factorization.

56421593 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32400, while the sum is 35.

The square root of 56421593 is about 7511.4308224199. The cubic root of 56421593 is about 383.5439305728.

The spelling of 56421593 in words is "fifty-six million, four hundred twenty-one thousand, five hundred ninety-three".