90494421 has 32 divisors (see below), whose sum is σ = 127948800. Its totient is φ = 56833920.

The previous prime is 90494387. The next prime is 90494423. The reversal of 90494421 is 12449409.

It is not a de Polignac number, because 90494421 - 2⁶ = 90494357 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90494423) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 650970 + ... + 651108.

It is an arithmetic number, because the mean of its divisors is an integer number (3998400).

Almost surely, 2^90494421 is an apocalyptic number.

It is an amenable number.

90494421 is a deficient number, since it is larger than the sum of its proper divisors (37454379).

90494421 is a wasteful number, since it uses less digits than its factorization.

90494421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329.

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 90494421 is about 9512.8555649710. The cubic root of 90494421 is about 448.9596063549.

The spelling of 90494421 in words is "ninety million, four hundred ninety-four thousand, four hundred twenty-one".