90679 has 2 divisors, whose sum is σ = 90680. Its totient is φ = 90678.

The previous prime is 90677. The next prime is 90697. The reversal of 90679 is 97609.

Together with next prime (90697) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is an emirp because it is prime and its reverse (97609) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90679 - 2¹ = 90677 is a prime.

Together with 90677, it forms a pair of twin primes.

90679 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 90679.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45339 + 45340.

It is an arithmetic number, because the mean of its divisors is an integer number (45340).

2⁹⁰⁶⁷⁹ is an apocalyptic number.

90679 is a deficient number, since it is larger than the sum of its proper divisors (1).

90679 is an equidigital number, since it uses as much as digits as its factorization.

90679 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3402, while the sum is 31.

The square root of 90679 is about 301.1295402314. The cubic root of 90679 is about 44.9264642608.

The spelling of 90679 in words is "ninety thousand, six hundred seventy-nine".