90910110001 has 2 divisors, whose sum is σ = 90910110002. Its totient is φ = 90910110000.

The previous prime is 90910109977. The next prime is 90910110007. The reversal of 90910110001 is 10001101909.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 90375390625 + 534719376 = 300625^2 + 23124^2 .

It is an emirp because it is prime and its reverse (10001101909) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90910110001 - 2³¹ = 88762626353 is a prime.

It is not a weakly prime, because it can be changed into another prime (90910110007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45455055000 + 45455055001.

It is an arithmetic number, because the mean of its divisors is an integer number (45455055001).

Almost surely, 2^90910110001 is an apocalyptic number.

It is an amenable number.

90910110001 is a deficient number, since it is larger than the sum of its proper divisors (1).

90910110001 is an equidigital number, since it uses as much as digits as its factorization.

90910110001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81, while the sum is 22.

The spelling of 90910110001 in words is "ninety billion, nine hundred ten million, one hundred ten thousand, one".