9906059491 has 2 divisors, whose sum is σ = 9906059492. Its totient is φ = 9906059490.

The previous prime is 9906059419. The next prime is 9906059533. The reversal of 9906059491 is 1949506099.

Together with previous prime (9906059419) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 9906059491 - 2⁷ = 9906059363 is a prime.

It is not a weakly prime, because it can be changed into another prime (9906059291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4953029745 + 4953029746.

It is an arithmetic number, because the mean of its divisors is an integer number (4953029746).

Almost surely, 2^9906059491 is an apocalyptic number.

9906059491 is a deficient number, since it is larger than the sum of its proper divisors (1).

9906059491 is an equidigital number, since it uses as much as digits as its factorization.

9906059491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 787320, while the sum is 52.

The square root of 9906059491 is about 99529.1891406737. The cubic root of 9906059491 is about 2147.6671643777.

The spelling of 9906059491 in words is "nine billion, nine hundred six million, fifty-nine thousand, four hundred ninety-one".