9945906071 has 2 divisors, whose sum is σ = 9945906072. Its totient is φ = 9945906070.

The previous prime is 9945906043. The next prime is 9945906107. The reversal of 9945906071 is 1706095499.

Together with next prime (9945906107) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is an emirp because it is prime and its reverse (1706095499) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9945906071 - 2²⁶ = 9878797207 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9945906011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4972953035 + 4972953036.

It is an arithmetic number, because the mean of its divisors is an integer number (4972953036).

Almost surely, 2^9945906071 is an apocalyptic number.

9945906071 is a deficient number, since it is larger than the sum of its proper divisors (1).

9945906071 is an equidigital number, since it uses as much as digits as its factorization.

9945906071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 612360, while the sum is 50.

The square root of 9945906071 is about 99729.1635932038. The cubic root of 9945906071 is about 2150.5429363267.

The spelling of 9945906071 in words is "nine billion, nine hundred forty-five million, nine hundred six thousand, seventy-one".