83650621 has 4 divisors (see below), whose sum is σ = 83936412. Its totient is φ = 83364832.

The previous prime is 83650607. The next prime is 83650631. The reversal of 83650621 is 12605638.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 55666521 + 27984100 = 7461^2 + 5290^2 .

It is a cyclic number.

It is not a de Polignac number, because 83650621 - 2⁹ = 83650109 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 (83650631) 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, 142456 + ... + 143041.

It is an arithmetic number, because the mean of its divisors is an integer number (20984103).

Almost surely, 2^83650621 is an apocalyptic number.

It is an amenable number.

83650621 is a deficient number, since it is larger than the sum of its proper divisors (285791).

83650621 is a wasteful number, since it uses less digits than its factorization.

83650621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285790.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 83650621 is about 9146.0713423852. The cubic root of 83650621 is about 437.3438829102.

The spelling of 83650621 in words is "eighty-three million, six hundred fifty thousand, six hundred twenty-one".