90890393 has 8 divisors (see below), whose sum is σ = 100117056. Its totient is φ = 81824400.

The previous prime is 90890383. The next prime is 90890407. The reversal of 90890393 is 39309809.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 90890393 - 2⁴ = 90890377 is a prime.

It is a super-2 number, since 2×90890393² = 16522127079388898, 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 90890393.

It is not an unprimeable number, because it can be changed into a prime (90890323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38978 + ... + 41243.

It is an arithmetic number, because the mean of its divisors is an integer number (12514632).

Almost surely, 2^90890393 is an apocalyptic number.

It is an amenable number.

90890393 is a deficient number, since it is larger than the sum of its proper divisors (9226663).

90890393 is a wasteful number, since it uses less digits than its factorization.

90890393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80335.

The product of its (nonzero) digits is 52488, while the sum is 41.

The square root of 90890393 is about 9533.6453154080. The cubic root of 90890393 is about 449.6134837444.

The spelling of 90890393 in words is "ninety million, eight hundred ninety thousand, three hundred ninety-three".