84090993 has 32 divisors (see below), whose sum is σ = 136984320. Its totient is φ = 44789760.

The previous prime is 84090983. The next prime is 84091009. The reversal of 84090993 is 39909048.

It is not a de Polignac number, because 84090993 - 2⁴ = 84090977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (84090953) 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, 37833 + ... + 39993.

It is an arithmetic number, because the mean of its divisors is an integer number (4280760).

Almost surely, 2^84090993 is an apocalyptic number.

It is an amenable number.

84090993 is a deficient number, since it is larger than the sum of its proper divisors (52893327).

84090993 is a wasteful number, since it uses less digits than its factorization.

84090993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2297.

The product of its (nonzero) digits is 69984, while the sum is 42.

The square root of 84090993 is about 9170.1141214273. The cubic root of 84090993 is about 438.1099940594.

The spelling of 84090993 in words is "eighty-four million, ninety thousand, nine hundred ninety-three".