90442103 has 4 divisors (see below), whose sum is σ = 91975080. Its totient is φ = 88909128.

The previous prime is 90442081. The next prime is 90442169. The reversal of 90442103 is 30124409.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30124409 = 7 ⋅4303487.

It is a cyclic number.

It is not a de Polignac number, because 90442103 - 2¹⁰ = 90441079 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 (90448103) 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 in 3 ways as a sum of consecutive naturals, for example, 766400 + ... + 766517.

It is an arithmetic number, because the mean of its divisors is an integer number (22993770).

Almost surely, 2^90442103 is an apocalyptic number.

90442103 is a deficient number, since it is larger than the sum of its proper divisors (1532977).

90442103 is a wasteful number, since it uses less digits than its factorization.

90442103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1532976.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 90442103 is about 9510.1053096167. The cubic root of 90442103 is about 448.8730699090.

The spelling of 90442103 in words is "ninety million, four hundred forty-two thousand, one hundred three".