83421000 has 384 divisors, whose sum is σ = 327075840. Its totient is φ = 19008000.

The previous prime is 83420983. The next prime is 83421011. The reversal of 83421000 is 12438.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2690985 + ... + 2691015.

It is an arithmetic number, because the mean of its divisors is an integer number (851760).

Almost surely, 2^83421000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 83421000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (163537920).

83421000 is an abundant number, since it is smaller than the sum of its proper divisors (243654840).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

83421000 is a wasteful number, since it uses less digits than its factorization.

83421000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94 (or 77 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 83421000 is about 9133.5097306567. The cubic root of 83421000 is about 436.9433464635.

Adding to 83421000 its reverse (12438), we get a palindrome (83433438).

The spelling of 83421000 in words is "eighty-three million, four hundred twenty-one thousand".