56809537 has 2 divisors, whose sum is σ = 56809538. Its totient is φ = 56809536.

The previous prime is 56809469. The next prime is 56809553. The reversal of 56809537 is 73590865.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37834801 + 18974736 = 6151^2 + 4356^2 .

It is a cyclic number.

It is not a de Polignac number, because 56809537 - 2²³ = 48420929 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 56809493 and 56809502.

It is not a weakly prime, because it can be changed into another prime (56800537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28404768 + 28404769.

It is an arithmetic number, because the mean of its divisors is an integer number (28404769).

Almost surely, 2^56809537 is an apocalyptic number.

It is an amenable number.

56809537 is a deficient number, since it is larger than the sum of its proper divisors (1).

56809537 is an equidigital number, since it uses as much as digits as its factorization.

56809537 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 226800, while the sum is 43.

The square root of 56809537 is about 7537.2101602649. The cubic root of 56809537 is about 384.4209815395.

The spelling of 56809537 in words is "fifty-six million, eight hundred nine thousand, five hundred thirty-seven".