43148999609 has 2 divisors, whose sum is σ = 43148999610. Its totient is φ = 43148999608.

The previous prime is 43148999567. The next prime is 43148999693. The reversal of 43148999609 is 90699984134.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35688877225 + 7460122384 = 188915^2 + 86372^2 .

It is a cyclic number.

It is not a de Polignac number, because 43148999609 - 2³² = 38854032313 is a prime.

It is not a weakly prime, because it can be changed into another prime (43148999209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21574499804 + 21574499805.

It is an arithmetic number, because the mean of its divisors is an integer number (21574499805).

Almost surely, 2^43148999609 is an apocalyptic number.

It is an amenable number.

43148999609 is a deficient number, since it is larger than the sum of its proper divisors (1).

43148999609 is an equidigital number, since it uses as much as digits as its factorization.

43148999609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15116544, while the sum is 62.

The spelling of 43148999609 in words is "forty-three billion, one hundred forty-eight million, nine hundred ninety-nine thousand, six hundred nine".