90213803 has 2 divisors, whose sum is σ = 90213804. Its totient is φ = 90213802.

The previous prime is 90213743. The next prime is 90213811. The reversal of 90213803 is 30831209.

It is a strong prime.

It is an emirp because it is prime and its reverse (30831209) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90213803 is a prime.

It is not a weakly prime, because it can be changed into another prime (90213103) 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, 45106901 + 45106902.

It is an arithmetic number, because the mean of its divisors is an integer number (45106902).

Almost surely, 2^90213803 is an apocalyptic number.

90213803 is a deficient number, since it is larger than the sum of its proper divisors (1).

90213803 is an equidigital number, since it uses as much as digits as its factorization.

90213803 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 90213803 is about 9498.0947036761. The cubic root of 90213803 is about 448.4950598650.

The spelling of 90213803 in words is "ninety million, two hundred thirteen thousand, eight hundred three".