983621 has 4 divisors (see below), whose sum is σ = 988812. Its totient is φ = 978432.

The previous prime is 983617. The next prime is 983659. The reversal of 983621 is 126389.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 126389 = 211 ⋅599.

It can be written as a sum of positive squares in 2 ways, for example, as 722500 + 261121 = 850^2 + 511^2 .

It is a cyclic number.

It is not a de Polignac number, because 983621 - 2² = 983617 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 15.

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 983621.

It is not an unprimeable number, because it can be changed into a prime (980621) 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, 2300 + ... + 2693.

It is an arithmetic number, because the mean of its divisors is an integer number (247203).

2⁹⁸³⁶²¹ is an apocalyptic number.

It is an amenable number.

983621 is a deficient number, since it is larger than the sum of its proper divisors (5191).

983621 is a wasteful number, since it uses less digits than its factorization.

983621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5190.

The product of its digits is 2592, while the sum is 29.

The square root of 983621 is about 991.7766885746. The cubic root of 983621 is about 99.4510251140.

The spelling of 983621 in words is "nine hundred eighty-three thousand, six hundred twenty-one".