43749387373 has 2 divisors, whose sum is σ = 43749387374. Its totient is φ = 43749387372.

The previous prime is 43749387337. The next prime is 43749387469. The reversal of 43749387373 is 37378394734.

Together with previous prime (43749387337) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40120891204 + 3628496169 = 200302^2 + 60237^2 .

It is a cyclic number.

It is not a de Polignac number, because 43749387373 - 2³³ = 35159452781 is a prime.

It is a super-2 number, since 2×43749387373² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43749387323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21874693686 + 21874693687.

It is an arithmetic number, because the mean of its divisors is an integer number (21874693687).

Almost surely, 2^43749387373 is an apocalyptic number.

It is an amenable number.

43749387373 is a deficient number, since it is larger than the sum of its proper divisors (1).

43749387373 is an equidigital number, since it uses as much as digits as its factorization.

43749387373 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32006016, while the sum is 58.

The spelling of 43749387373 in words is "forty-three billion, seven hundred forty-nine million, three hundred eighty-seven thousand, three hundred seventy-three".