61439713943 has 2 divisors, whose sum is σ = 61439713944. Its totient is φ = 61439713942.

The previous prime is 61439713921. The next prime is 61439713949. The reversal of 61439713943 is 34931793416.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61439713943 - 2⁶ = 61439713879 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 61439713891 and 61439713900.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61439713949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30719856971 + 30719856972.

It is an arithmetic number, because the mean of its divisors is an integer number (30719856972).

Almost surely, 2^61439713943 is an apocalyptic number.

61439713943 is a deficient number, since it is larger than the sum of its proper divisors (1).

61439713943 is an equidigital number, since it uses as much as digits as its factorization.

61439713943 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1469664, while the sum is 50.

The spelling of 61439713943 in words is "sixty-one billion, four hundred thirty-nine million, seven hundred thirteen thousand, nine hundred forty-three".