83321620 has 12 divisors (see below), whose sum is σ = 174975444. Its totient is φ = 33328640.

The previous prime is 83321603. The next prime is 83321621. The reversal of 83321620 is 2612338.

It can be written as a sum of positive squares in 2 ways, for example, as 65999376 + 17322244 = 8124^2 + 4162^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83321621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2083021 + ... + 2083060.

It is an arithmetic number, because the mean of its divisors is an integer number (14581287).

Almost surely, 2^83321620 is an apocalyptic number.

It is an amenable number.

83321620 is an abundant number, since it is smaller than the sum of its proper divisors (91653824).

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

83321620 is a wasteful number, since it uses less digits than its factorization.

83321620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4166090 (or 4166088 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 83321620 is about 9128.0677035175. The cubic root of 83321620 is about 436.7697663309.

Adding to 83321620 its reverse (2612338), we get a palindrome (85933958).

The spelling of 83321620 in words is "eighty-three million, three hundred twenty-one thousand, six hundred twenty".