90154289 has 2 divisors, whose sum is σ = 90154290. Its totient is φ = 90154288.

The previous prime is 90154283. The next prime is 90154303. The reversal of 90154289 is 98245109.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74218225 + 15936064 = 8615^2 + 3992^2 .

It is an emirp because it is prime and its reverse (98245109) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90154289 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (90154283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45077144 + 45077145.

It is an arithmetic number, because the mean of its divisors is an integer number (45077145).

Almost surely, 2^90154289 is an apocalyptic number.

It is an amenable number.

90154289 is a deficient number, since it is larger than the sum of its proper divisors (1).

90154289 is an equidigital number, since it uses as much as digits as its factorization.

90154289 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25920, while the sum is 38.

The square root of 90154289 is about 9494.9612426802. The cubic root of 90154289 is about 448.3964141819.

The spelling of 90154289 in words is "ninety million, one hundred fifty-four thousand, two hundred eighty-nine".