90215999983 has 2 divisors, whose sum is σ = 90215999984. Its totient is φ = 90215999982.

The previous prime is 90215999981. The next prime is 90216000011. The reversal of 90215999983 is 38999951209.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 90215999983 - 2¹ = 90215999981 is a prime.

Together with 90215999981, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90215999981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45107999991 + 45107999992.

It is an arithmetic number, because the mean of its divisors is an integer number (45107999992).

Almost surely, 2^90215999983 is an apocalyptic number.

90215999983 is a deficient number, since it is larger than the sum of its proper divisors (1).

90215999983 is an equidigital number, since it uses as much as digits as its factorization.

90215999983 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14171760, while the sum is 64.

The spelling of 90215999983 in words is "ninety billion, two hundred fifteen million, nine hundred ninety-nine thousand, nine hundred eighty-three".