90523219 has 2 divisors, whose sum is σ = 90523220. Its totient is φ = 90523218.

The previous prime is 90523159. The next prime is 90523241. The reversal of 90523219 is 91232509.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90523219 is a prime.

It is a super-2 number, since 2×90523219² = 16388906356243922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (90521219) 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, 45261609 + 45261610.

It is an arithmetic number, because the mean of its divisors is an integer number (45261610).

Almost surely, 2^90523219 is an apocalyptic number.

90523219 is a deficient number, since it is larger than the sum of its proper divisors (1).

90523219 is an equidigital number, since it uses as much as digits as its factorization.

90523219 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4860, while the sum is 31.

The square root of 90523219 is about 9514.3690805013. The cubic root of 90523219 is about 449.0072253770.

The spelling of 90523219 in words is "ninety million, five hundred twenty-three thousand, two hundred nineteen".