90105907 has 2 divisors, whose sum is σ = 90105908. Its totient is φ = 90105906.

The previous prime is 90105889. The next prime is 90105931. The reversal of 90105907 is 70950109.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90105907 is a prime.

It is equal to p_5222776 and since 90105907 and 5222776 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (90105937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45052953 + 45052954.

It is an arithmetic number, because the mean of its divisors is an integer number (45052954).

Almost surely, 2^90105907 is an apocalyptic number.

90105907 is a deficient number, since it is larger than the sum of its proper divisors (1).

90105907 is an equidigital number, since it uses as much as digits as its factorization.

90105907 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2835, while the sum is 31.

The square root of 90105907 is about 9492.4131283884. The cubic root of 90105907 is about 448.3161880218.

The spelling of 90105907 in words is "ninety million, one hundred five thousand, nine hundred seven".