83345621 has 4 divisors (see below), whose sum is σ = 83431392. Its totient is φ = 83259852.

The previous prime is 83345599. The next prime is 83345663. The reversal of 83345621 is 12654338.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 83345621 - 2¹⁴ = 83329237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83345671) 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, 41411 + ... + 43376.

It is an arithmetic number, because the mean of its divisors is an integer number (20857848).

Almost surely, 2^83345621 is an apocalyptic number.

It is an amenable number.

83345621 is a deficient number, since it is larger than the sum of its proper divisors (85771).

83345621 is an equidigital number, since it uses as much as digits as its factorization.

83345621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85770.

The product of its digits is 17280, while the sum is 32.

The square root of 83345621 is about 9129.3822901662. The cubic root of 83345621 is about 436.8116998442.

Adding to 83345621 its reverse (12654338), we get a palindrome (95999959).

The spelling of 83345621 in words is "eighty-three million, three hundred forty-five thousand, six hundred twenty-one".