97090823 has 2 divisors, whose sum is σ = 97090824. Its totient is φ = 97090822.

The previous prime is 97090793. The next prime is 97090871. The reversal of 97090823 is 32809079.

It is a weak prime.

It is an emirp because it is prime and its reverse (32809079) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 97090823 - 2⁶ = 97090759 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97090423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48545411 + 48545412.

It is an arithmetic number, because the mean of its divisors is an integer number (48545412).

Almost surely, 2^97090823 is an apocalyptic number.

97090823 is a deficient number, since it is larger than the sum of its proper divisors (1).

97090823 is an equidigital number, since it uses as much as digits as its factorization.

97090823 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27216, while the sum is 38.

The square root of 97090823 is about 9853.4675622341. The cubic root of 97090823 is about 459.6134481016.

The spelling of 97090823 in words is "ninety-seven million, ninety thousand, eight hundred twenty-three".