90857983 has 2 divisors, whose sum is σ = 90857984. Its totient is φ = 90857982.

The previous prime is 90857947. The next prime is 90858007. The reversal of 90857983 is 38975809.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 90857983 - 2⁹ = 90857471 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90857933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45428991 + 45428992.

It is an arithmetic number, because the mean of its divisors is an integer number (45428992).

Almost surely, 2^90857983 is an apocalyptic number.

90857983 is a deficient number, since it is larger than the sum of its proper divisors (1).

90857983 is an equidigital number, since it uses as much as digits as its factorization.

90857983 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 544320, while the sum is 49.

The square root of 90857983 is about 9531.9453943044. The cubic root of 90857983 is about 449.5600358317.

The spelling of 90857983 in words is "ninety million, eight hundred fifty-seven thousand, nine hundred eighty-three".