90010009997 has 2 divisors, whose sum is σ = 90010009998. Its totient is φ = 90010009996.

The previous prime is 90010009981. The next prime is 90010010011. The reversal of 90010009997 is 79990001009.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 85434028681 + 4575981316 = 292291^2 + 67646^2 .

It is a cyclic number.

It is not a de Polignac number, because 90010009997 - 2⁴ = 90010009981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90010009697) 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, 45005004998 + 45005004999.

It is an arithmetic number, because the mean of its divisors is an integer number (45005004999).

Almost surely, 2^90010009997 is an apocalyptic number.

It is an amenable number.

90010009997 is a deficient number, since it is larger than the sum of its proper divisors (1).

90010009997 is an equidigital number, since it uses as much as digits as its factorization.

90010009997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 45927, while the sum is 44.

The spelling of 90010009997 in words is "ninety billion, ten million, nine thousand, nine hundred ninety-seven".