90111143 has 2 divisors, whose sum is σ = 90111144. Its totient is φ = 90111142.

The previous prime is 90111107. The next prime is 90111179. The reversal of 90111143 is 34111109.

It is a balanced prime because it is at equal distance from previous prime (90111107) and next prime (90111179).

It is an emirp because it is prime and its reverse (34111109) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90111143 - 2¹⁴ = 90094759 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90111103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45055571 + 45055572.

It is an arithmetic number, because the mean of its divisors is an integer number (45055572).

Almost surely, 2^90111143 is an apocalyptic number.

90111143 is a deficient number, since it is larger than the sum of its proper divisors (1).

90111143 is an equidigital number, since it uses as much as digits as its factorization.

90111143 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 20.

The square root of 90111143 is about 9492.6889235875. The cubic root of 90111143 is about 448.3248716482.

The spelling of 90111143 in words is "ninety million, one hundred eleven thousand, one hundred forty-three".