43193949437 has 2 divisors, whose sum is σ = 43193949438. Its totient is φ = 43193949436.

The previous prime is 43193949431. The next prime is 43193949451. The reversal of 43193949437 is 73494939134.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38883501721 + 4310447716 = 197189^2 + 65654^2 .

It is a cyclic number.

It is not a de Polignac number, because 43193949437 - 2⁶ = 43193949373 is a prime.

It is a super-2 number, since 2×43193949437² (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 (43193949431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21596974718 + 21596974719.

It is an arithmetic number, because the mean of its divisors is an integer number (21596974719).

Almost surely, 2^43193949437 is an apocalyptic number.

It is an amenable number.

43193949437 is a deficient number, since it is larger than the sum of its proper divisors (1).

43193949437 is an equidigital number, since it uses as much as digits as its factorization.

43193949437 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8817984, while the sum is 56.

The spelling of 43193949437 in words is "forty-three billion, one hundred ninety-three million, nine hundred forty-nine thousand, four hundred thirty-seven".