90720033 has 8 divisors (see below), whose sum is σ = 125131200. Its totient is φ = 58394448.

The previous prime is 90720029. The next prime is 90720059. The reversal of 90720033 is 33002709.

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

It is not a de Polignac number, because 90720033 - 2² = 90720029 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 90719985 and 90720012.

It is not an unprimeable number, because it can be changed into a prime (90720023) 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 7 ways as a sum of consecutive naturals, for example, 521293 + ... + 521466.

It is an arithmetic number, because the mean of its divisors is an integer number (15641400).

Almost surely, 2^90720033 is an apocalyptic number.

It is an amenable number.

90720033 is a deficient number, since it is larger than the sum of its proper divisors (34411167).

90720033 is a wasteful number, since it uses less digits than its factorization.

90720033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1042791.

The product of its (nonzero) digits is 1134, while the sum is 24.

The square root of 90720033 is about 9524.7064521695. The cubic root of 90720033 is about 449.3323977156.

The spelling of 90720033 in words is "ninety million, seven hundred twenty thousand, thirty-three".