90619 has 2 divisors, whose sum is σ = 90620. Its totient is φ = 90618.

The previous prime is 90617. The next prime is 90631. The reversal of 90619 is 91609.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 90619 - 2¹ = 90617 is a prime.

It is a super-2 number, since 2×90619² = 16423606322, which contains 22 as substring.

Together with 90617, it forms a pair of twin primes.

It is an Ulam number.

90619 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 90593 and 90602.

It is not a weakly prime, because it can be changed into another prime (90617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45309 + 45310.

It is an arithmetic number, because the mean of its divisors is an integer number (45310).

2⁹⁰⁶¹⁹ is an apocalyptic number.

90619 is a deficient number, since it is larger than the sum of its proper divisors (1).

90619 is an equidigital number, since it uses as much as digits as its factorization.

90619 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 486, while the sum is 25.

The square root of 90619 is about 301.0298988473. The cubic root of 90619 is about 44.9165531730.

Subtracting 90619 from its reverse (91609), we obtain a triangular number (990 = T₄₄).

The spelling of 90619 in words is "ninety thousand, six hundred nineteen".