90908143 has 2 divisors, whose sum is σ = 90908144. Its totient is φ = 90908142.

The previous prime is 90908113. The next prime is 90908177. The reversal of 90908143 is 34180909.

It is an a-pointer prime, because the next prime (90908177) can be obtained adding 90908143 to its sum of digits (34).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90908143 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 90908099 and 90908108.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90908113) 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, 45454071 + 45454072.

It is an arithmetic number, because the mean of its divisors is an integer number (45454072).

Almost surely, 2^90908143 is an apocalyptic number.

90908143 is a deficient number, since it is larger than the sum of its proper divisors (1).

90908143 is an equidigital number, since it uses as much as digits as its factorization.

90908143 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 90908143 is about 9534.5761835543. The cubic root of 90908143 is about 449.6427502034.

The spelling of 90908143 in words is "ninety million, nine hundred eight thousand, one hundred forty-three".