43091197249 has 2 divisors, whose sum is σ = 43091197250. Its totient is φ = 43091197248.

The previous prime is 43091197213. The next prime is 43091197267. The reversal of 43091197249 is 94279119034.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41684572224 + 1406625025 = 204168^2 + 37505^2 .

It is a cyclic number.

It is not a de Polignac number, because 43091197249 - 2³³ = 34501262657 is a prime.

It is not a weakly prime, because it can be changed into another prime (43091194249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21545598624 + 21545598625.

It is an arithmetic number, because the mean of its divisors is an integer number (21545598625).

Almost surely, 2^43091197249 is an apocalyptic number.

It is an amenable number.

43091197249 is a deficient number, since it is larger than the sum of its proper divisors (1).

43091197249 is an equidigital number, since it uses as much as digits as its factorization.

43091197249 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 489888, while the sum is 49.

The spelling of 43091197249 in words is "forty-three billion, ninety-one million, one hundred ninety-seven thousand, two hundred forty-nine".