43421320907 has 2 divisors, whose sum is σ = 43421320908. Its totient is φ = 43421320906.

The previous prime is 43421320903. The next prime is 43421320931. The reversal of 43421320907 is 70902312434.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 43421320907 - 2² = 43421320903 is a prime.

It is a super-2 number, since 2×43421320907² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (43421320903) 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, 21710660453 + 21710660454.

It is an arithmetic number, because the mean of its divisors is an integer number (21710660454).

Almost surely, 2^43421320907 is an apocalyptic number.

43421320907 is a deficient number, since it is larger than the sum of its proper divisors (1).

43421320907 is an equidigital number, since it uses as much as digits as its factorization.

43421320907 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 35.

The spelling of 43421320907 in words is "forty-three billion, four hundred twenty-one million, three hundred twenty thousand, nine hundred seven".