90393047 has 4 divisors (see below), whose sum is σ = 90552480. Its totient is φ = 90233616.

The previous prime is 90393041. The next prime is 90393067. The reversal of 90393047 is 74039309.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 90393047 - 2¹⁰ = 90392023 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 90392998 and 90393016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90393041) 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, 78863 + ... + 80000.

It is an arithmetic number, because the mean of its divisors is an integer number (22638120).

Almost surely, 2^90393047 is an apocalyptic number.

90393047 is a deficient number, since it is larger than the sum of its proper divisors (159433).

90393047 is a wasteful number, since it uses less digits than its factorization.

90393047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159432.

The product of its (nonzero) digits is 20412, while the sum is 35.

The square root of 90393047 is about 9507.5258085372. The cubic root of 90393047 is about 448.7918986440.

The spelling of 90393047 in words is "ninety million, three hundred ninety-three thousand, forty-seven".