43929997 has 2 divisors, whose sum is σ = 43929998. Its totient is φ = 43929996.

The previous prime is 43929979. The next prime is 43930021. The reversal of 43929997 is 79992934.

43929997 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with previous prime (43929979) 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., 43705321 + 224676 = 6611^2 + 474^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43929997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43929917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21964998 + 21964999.

It is an arithmetic number, because the mean of its divisors is an integer number (21964999).

Almost surely, 2^43929997 is an apocalyptic number.

It is an amenable number.

43929997 is a deficient number, since it is larger than the sum of its proper divisors (1).

43929997 is an equidigital number, since it uses as much as digits as its factorization.

43929997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1102248, while the sum is 52.

The square root of 43929997 is about 6627.9708056086. The cubic root of 43929997 is about 352.8475106898.

The spelling of 43929997 in words is "forty-three million, nine hundred twenty-nine thousand, nine hundred ninety-seven".