90821201903 has 4 divisors (see below), whose sum is σ = 90823025040. Its totient is φ = 90819378768.

The previous prime is 90821201881. The next prime is 90821201981. The reversal of 90821201903 is 30910212809.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 90821201903 - 2¹⁴ = 90821185519 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90821201993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 834683 + ... + 937196.

It is an arithmetic number, because the mean of its divisors is an integer number (22705756260).

Almost surely, 2^90821201903 is an apocalyptic number.

90821201903 is a deficient number, since it is larger than the sum of its proper divisors (1823137).

90821201903 is a wasteful number, since it uses less digits than its factorization.

90821201903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1823136.

The product of its (nonzero) digits is 7776, while the sum is 35.

The spelling of 90821201903 in words is "ninety billion, eight hundred twenty-one million, two hundred one thousand, nine hundred three".