90804379 has 2 divisors, whose sum is σ = 90804380. Its totient is φ = 90804378.

The previous prime is 90804367. The next prime is 90804397. The reversal of 90804379 is 97340809.

Together with next prime (90804397) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 90804379 - 2⁷ = 90804251 is a prime.

It is not a weakly prime, because it can be changed into another prime (90804349) 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, 45402189 + 45402190.

It is an arithmetic number, because the mean of its divisors is an integer number (45402190).

Almost surely, 2^90804379 is an apocalyptic number.

90804379 is a deficient number, since it is larger than the sum of its proper divisors (1).

90804379 is an equidigital number, since it uses as much as digits as its factorization.

90804379 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 90804379 is about 9529.1331714905. The cubic root of 90804379 is about 449.4716086106.

The spelling of 90804379 in words is "ninety million, eight hundred four thousand, three hundred seventy-nine".