43807672949 has 2 divisors, whose sum is σ = 43807672950. Its totient is φ = 43807672948.

The previous prime is 43807672891. The next prime is 43807672969. The reversal of 43807672949 is 94927670834.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34733776900 + 9073896049 = 186370^2 + 95257^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43807672949 is a prime.

It is a super-2 number, since 2×43807672949² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43807672969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21903836474 + 21903836475.

It is an arithmetic number, because the mean of its divisors is an integer number (21903836475).

Almost surely, 2^43807672949 is an apocalyptic number.

It is an amenable number.

43807672949 is a deficient number, since it is larger than the sum of its proper divisors (1).

43807672949 is an equidigital number, since it uses as much as digits as its factorization.

43807672949 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18289152, while the sum is 59.

The spelling of 43807672949 in words is "forty-three billion, eight hundred seven million, six hundred seventy-two thousand, nine hundred forty-nine".