90689262194281 has 3 divisors (see below), whose sum is σ = 90689271717373. Its totient is φ = 90689252671190.

The previous prime is 90689262194213. The next prime is 90689262194303. The reversal of 90689262194281 is 18249126298609.

The square root of 90689262194281 is 9523091.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 90689262194281 - 2²⁷ = 90689127976553 is a prime.

It is a super-2 number, since 2×90689262194281² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90689262194081) 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 2 ways as a sum of consecutive naturals, for example, 4761546 + ... + 14284636.

Almost surely, 2^{90689262194281} is an apocalyptic number.

90689262194281 is the 9523091-st square number.

90689262194281 is the 4761546-th centered octagonal number.

It is an amenable number.

90689262194281 is a deficient number, since it is larger than the sum of its proper divisors (9523092).

90689262194281 is an frugal number, since it uses more digits than its factorization.

90689262194281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19046182 (or 9523091 counting only the distinct ones).

The product of its (nonzero) digits is 53747712, while the sum is 67.

The spelling of 90689262194281 in words is "ninety trillion, six hundred eighty-nine billion, two hundred sixty-two million, one hundred ninety-four thousand, two hundred eighty-one".