90690093 has 24 divisors (see below), whose sum is σ = 141541400. Its totient is φ = 55624320.

The previous prime is 90690091. The next prime is 90690109. The reversal of 90690093 is 39009609.

It can be written as a sum of positive squares in 4 ways, for example, as 14424804 + 76265289 = 3798^2 + 8733^2 .

It is not a de Polignac number, because 90690093 - 2¹ = 90690091 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90690091) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 39723 + ... + 41943.

Almost surely, 2^90690093 is an apocalyptic number.

It is an amenable number.

90690093 is a deficient number, since it is larger than the sum of its proper divisors (50851307).

90690093 is a wasteful number, since it uses less digits than its factorization.

90690093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2589 (or 2586 counting only the distinct ones).

The product of its (nonzero) digits is 13122, while the sum is 36.

The square root of 90690093 is about 9523.1346204913. The cubic root of 90690093 is about 449.2829617687.

The spelling of 90690093 in words is "ninety million, six hundred ninety thousand, ninety-three".