99783421 has 8 divisors (see below), whose sum is σ = 111214080. Its totient is φ = 88970688.

The previous prime is 99783379. The next prime is 99783427. The reversal of 99783421 is 12438799.

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

It is a cyclic number.

It is not a de Polignac number, because 99783421 - 2¹³ = 99775229 is a prime.

It is a super-2 number, since 2×99783421² = 19913462212926482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99783427) 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, 154141 + ... + 154786.

It is an arithmetic number, because the mean of its divisors is an integer number (13901760).

Almost surely, 2^99783421 is an apocalyptic number.

It is an amenable number.

99783421 is a deficient number, since it is larger than the sum of its proper divisors (11430659).

99783421 is a wasteful number, since it uses less digits than its factorization.

99783421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308963.

The product of its digits is 108864, while the sum is 43.

The square root of 99783421 is about 9989.1651803341. The cubic root of 99783421 is about 463.8235509354.

The spelling of 99783421 in words is "ninety-nine million, seven hundred eighty-three thousand, four hundred twenty-one".