43043999477 has 2 divisors, whose sum is σ = 43043999478. Its totient is φ = 43043999476.

The previous prime is 43043999429. The next prime is 43043999501. The reversal of 43043999477 is 77499934034.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39423690916 + 3620308561 = 198554^2 + 60169^2 .

It is a cyclic number.

It is not a de Polignac number, because 43043999477 - 2⁶ = 43043999413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43043999077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21521999738 + 21521999739.

It is an arithmetic number, because the mean of its divisors is an integer number (21521999739).

Almost surely, 2^43043999477 is an apocalyptic number.

It is an amenable number.

43043999477 is a deficient number, since it is larger than the sum of its proper divisors (1).

43043999477 is an equidigital number, since it uses as much as digits as its factorization.

43043999477 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20575296, while the sum is 59.

The spelling of 43043999477 in words is "forty-three billion, forty-three million, nine hundred ninety-nine thousand, four hundred seventy-seven".