61568443 has 2 divisors, whose sum is σ = 61568444. Its totient is φ = 61568442.

The previous prime is 61568371. The next prime is 61568453. The reversal of 61568443 is 34486516.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61568443 is a prime.

It is not a weakly prime, because it can be changed into another prime (61568453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30784221 + 30784222.

It is an arithmetic number, because the mean of its divisors is an integer number (30784222).

Almost surely, 2^61568443 is an apocalyptic number.

61568443 is a deficient number, since it is larger than the sum of its proper divisors (1).

61568443 is an equidigital number, since it uses as much as digits as its factorization.

61568443 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69120, while the sum is 37.

The square root of 61568443 is about 7846.5561235487. The cubic root of 61568443 is about 394.8687124437.

The spelling of 61568443 in words is "sixty-one million, five hundred sixty-eight thousand, four hundred forty-three".