61320443 has 2 divisors, whose sum is σ = 61320444. Its totient is φ = 61320442.

The previous prime is 61320421. The next prime is 61320463. The reversal of 61320443 is 34402316.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61320443 - 2¹² = 61316347 is a prime.

It is not a weakly prime, because it can be changed into another prime (61320403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30660221 + 30660222.

It is an arithmetic number, because the mean of its divisors is an integer number (30660222).

Almost surely, 2^61320443 is an apocalyptic number.

61320443 is a deficient number, since it is larger than the sum of its proper divisors (1).

61320443 is an equidigital number, since it uses as much as digits as its factorization.

61320443 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 61320443 is about 7830.7370662026. The cubic root of 61320443 is about 394.3378169824.

Adding to 61320443 its reverse (34402316), we get a palindrome (95722759).

The spelling of 61320443 in words is "sixty-one million, three hundred twenty thousand, four hundred forty-three".