90118771 has 2 divisors, whose sum is σ = 90118772. Its totient is φ = 90118770.

The previous prime is 90118759. The next prime is 90118793. The reversal of 90118771 is 17781109.

It is a weak prime.

It is an emirp because it is prime and its reverse (17781109) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90118771 - 2⁵ = 90118739 is a prime.

It is not a weakly prime, because it can be changed into another prime (90118871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45059385 + 45059386.

It is an arithmetic number, because the mean of its divisors is an integer number (45059386).

Almost surely, 2^90118771 is an apocalyptic number.

90118771 is a deficient number, since it is larger than the sum of its proper divisors (1).

90118771 is an equidigital number, since it uses as much as digits as its factorization.

90118771 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3528, while the sum is 34.

The square root of 90118771 is about 9493.0906979761. The cubic root of 90118771 is about 448.3375216768.

The spelling of 90118771 in words is "ninety million, one hundred eighteen thousand, seven hundred seventy-one".