90436628903 has 4 divisors (see below), whose sum is σ = 90473741160. Its totient is φ = 90399516648.

The previous prime is 90436628899. The next prime is 90436628987. The reversal of 90436628903 is 30982663409.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30982663409 = 101489 ⋅305281.

It is a cyclic number.

It is not a de Polignac number, because 90436628903 - 2² = 90436628899 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 (90436628003) 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 in 3 ways as a sum of consecutive naturals, for example, 18552473 + ... + 18557346.

It is an arithmetic number, because the mean of its divisors is an integer number (22618435290).

Almost surely, 2^90436628903 is an apocalyptic number.

90436628903 is a deficient number, since it is larger than the sum of its proper divisors (37112257).

90436628903 is a wasteful number, since it uses less digits than its factorization.

90436628903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37112256.

The product of its (nonzero) digits is 1679616, while the sum is 50.

The spelling of 90436628903 in words is "ninety billion, four hundred thirty-six million, six hundred twenty-eight thousand, nine hundred three".