90286421 has 2 divisors, whose sum is σ = 90286422. Its totient is φ = 90286420.

The previous prime is 90286411. The next prime is 90286429. The reversal of 90286421 is 12468209.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 88078225 + 2208196 = 9385^2 + 1486^2 .

It is a cyclic number.

It is not a de Polignac number, because 90286421 - 2²² = 86092117 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90286429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45143210 + 45143211.

It is an arithmetic number, because the mean of its divisors is an integer number (45143211).

Almost surely, 2^90286421 is an apocalyptic number.

It is an amenable number.

90286421 is a deficient number, since it is larger than the sum of its proper divisors (1).

90286421 is an equidigital number, since it uses as much as digits as its factorization.

90286421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 90286421 is about 9501.9167013819. The cubic root of 90286421 is about 448.6153669513.

The spelling of 90286421 in words is "ninety million, two hundred eighty-six thousand, four hundred twenty-one".