83621 has 2 divisors, whose sum is σ = 83622. Its totient is φ = 83620.

The previous prime is 83617. The next prime is 83639. The reversal of 83621 is 12638.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 83521 + 100 = 289^2 + 10^2 .

It is a cyclic number.

It is not a de Polignac number, because 83621 - 2² = 83617 is a prime.

It is a Chen prime.

It is a plaindrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 83593 and 83602.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 83621.

It is not a weakly prime, because it can be changed into another prime (83641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41810 + 41811.

It is an arithmetic number, because the mean of its divisors is an integer number (41811).

2⁸³⁶²¹ is an apocalyptic number.

It is an amenable number.

83621 is a deficient number, since it is larger than the sum of its proper divisors (1).

83621 is an equidigital number, since it uses as much as digits as its factorization.

83621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 288, while the sum is 20.

The square root of 83621 is about 289.1729586251. The cubic root of 83621 is about 43.7292255110.

The spelling of 83621 in words is "eighty-three thousand, six hundred twenty-one".