90108836287 has 4 divisors (see below), whose sum is σ = 90213736840. Its totient is φ = 90003935736.

The previous prime is 90108836273. The next prime is 90108836303. The reversal of 90108836287 is 78263880109.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78263880109 = 71887 ⋅1088707.

It is a cyclic number.

It is not a de Polignac number, because 90108836287 - 2⁷ = 90108836159 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 (90108836267) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52448988 + ... + 52450705.

It is an arithmetic number, because the mean of its divisors is an integer number (22553434210).

Almost surely, 2^90108836287 is an apocalyptic number.

90108836287 is a deficient number, since it is larger than the sum of its proper divisors (104900553).

90108836287 is a wasteful number, since it uses less digits than its factorization.

90108836287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104900552.

The product of its (nonzero) digits is 1161216, while the sum is 52.

The spelling of 90108836287 in words is "ninety billion, one hundred eight million, eight hundred thirty-six thousand, two hundred eighty-seven".