43973377337957 has 2 divisors, whose sum is σ = 43973377337958. Its totient is φ = 43973377337956.

The previous prime is 43973377337887. The next prime is 43973377337999. The reversal of 43973377337957 is 75973377337934.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38741151129121 + 5232226208836 = 6224239^2 + 2287406^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43973377337957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43973377307957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21986688668978 + 21986688668979.

It is an arithmetic number, because the mean of its divisors is an integer number (21986688668979).

Almost surely, 2^{43973377337957} is an apocalyptic number.

It is an amenable number.

43973377337957 is a deficient number, since it is larger than the sum of its proper divisors (1).

43973377337957 is an equidigital number, since it uses as much as digits as its factorization.

43973377337957 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6616243620, while the sum is 77.

The spelling of 43973377337957 in words is "forty-three trillion, nine hundred seventy-three billion, three hundred seventy-seven million, three hundred thirty-seven thousand, nine hundred fifty-seven".