90801669 has 16 divisors (see below), whose sum is σ = 138575360. Its totient is φ = 51807600.

The previous prime is 90801661. The next prime is 90801671. The reversal of 90801669 is 96610809.

It is not a de Polignac number, because 90801669 - 2³ = 90801661 is a prime.

It is a super-2 number, since 2×90801669² = 16489886186371122, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90801661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12594 + ... + 18444.

It is an arithmetic number, because the mean of its divisors is an integer number (8660960).

Almost surely, 2^90801669 is an apocalyptic number.

It is an amenable number.

90801669 is a deficient number, since it is larger than the sum of its proper divisors (47773691).

90801669 is a wasteful number, since it uses less digits than its factorization.

90801669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6600.

The product of its (nonzero) digits is 23328, while the sum is 39.

The square root of 90801669 is about 9528.9909749144. The cubic root of 90801669 is about 449.4671371663.

The spelling of 90801669 in words is "ninety million, eight hundred one thousand, six hundred sixty-nine".