90785419 has 2 divisors, whose sum is σ = 90785420. Its totient is φ = 90785418.

The previous prime is 90785417. The next prime is 90785459. The reversal of 90785419 is 91458709.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 90785419 - 2¹ = 90785417 is a prime.

It is a super-2 number, since 2×90785419² = 16483984606011122, which contains 22 as substring.

Together with 90785417, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (90785417) 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, 45392709 + 45392710.

It is an arithmetic number, because the mean of its divisors is an integer number (45392710).

Almost surely, 2^90785419 is an apocalyptic number.

90785419 is a deficient number, since it is larger than the sum of its proper divisors (1).

90785419 is an equidigital number, since it uses as much as digits as its factorization.

90785419 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90720, while the sum is 43.

The square root of 90785419 is about 9528.1382756549. The cubic root of 90785419 is about 449.4403231337.

It can be divided in two parts, 90785 and 419, that added together give a square (91204 = 302²).

The spelling of 90785419 in words is "ninety million, seven hundred eighty-five thousand, four hundred nineteen".