90073801 has 4 divisors (see below), whose sum is σ = 90731412. Its totient is φ = 89416192.

The previous prime is 90073793. The next prime is 90073811. The reversal of 90073801 is 10837009.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10837009 = 571 ⋅18979.

It can be written as a sum of positive squares in 2 ways, for example, as 48664576 + 41409225 = 6976^2 + 6435^2 .

It is a cyclic number.

It is not a de Polignac number, because 90073801 - 2³ = 90073793 is a prime.

It is a super-2 number, since 2×90073801² = 16226579253175202, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 90073801.

It is not an unprimeable number, because it can be changed into a prime (90073811) 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, 328600 + ... + 328873.

It is an arithmetic number, because the mean of its divisors is an integer number (22682853).

Almost surely, 2^90073801 is an apocalyptic number.

It is an amenable number.

90073801 is a deficient number, since it is larger than the sum of its proper divisors (657611).

90073801 is a wasteful number, since it uses less digits than its factorization.

90073801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 657610.

The product of its (nonzero) digits is 1512, while the sum is 28.

The square root of 90073801 is about 9490.7218376686. The cubic root of 90073801 is about 448.2629345785.

The spelling of 90073801 in words is "ninety million, seventy-three thousand, eight hundred one".