90643407 has 8 divisors (see below), whose sum is σ = 121072560. Its totient is φ = 60321600.

The previous prime is 90643393. The next prime is 90643457. The reversal of 90643407 is 70434609.

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

It is not a de Polignac number, because 90643407 - 2¹⁶ = 90577871 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90643457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24844 + ... + 28257.

It is an arithmetic number, because the mean of its divisors is an integer number (15134070).

Almost surely, 2^90643407 is an apocalyptic number.

90643407 is a deficient number, since it is larger than the sum of its proper divisors (30429153).

90643407 is a wasteful number, since it uses less digits than its factorization.

90643407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53673.

The product of its (nonzero) digits is 18144, while the sum is 33.

The square root of 90643407 is about 9520.6831162475. The cubic root of 90643407 is about 449.2058536601.

The spelling of 90643407 in words is "ninety million, six hundred forty-three thousand, four hundred seven".