9906256207 has 2 divisors, whose sum is σ = 9906256208. Its totient is φ = 9906256206.

The previous prime is 9906256153. The next prime is 9906256219. The reversal of 9906256207 is 7026526099.

It is a strong prime.

It is an emirp because it is prime and its reverse (7026526099) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9906256207 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9906256267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4953128103 + 4953128104.

It is an arithmetic number, because the mean of its divisors is an integer number (4953128104).

Almost surely, 2^9906256207 is an apocalyptic number.

9906256207 is a deficient number, since it is larger than the sum of its proper divisors (1).

9906256207 is an equidigital number, since it uses as much as digits as its factorization.

9906256207 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 408240, while the sum is 46.

The square root of 9906256207 is about 99530.1773684745. The cubic root of 9906256207 is about 2147.6813805148.

The spelling of 9906256207 in words is "nine billion, nine hundred six million, two hundred fifty-six thousand, two hundred seven".