201621983 has 8 divisors (see below), whose sum is σ = 204430080. Its totient is φ = 198820440.

The previous prime is 201621967. The next prime is 201621997. The reversal of 201621983 is 389126102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 201621983 - 2⁴ = 201621967 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 (201621083) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 120116 + ... + 121782.

It is an arithmetic number, because the mean of its divisors is an integer number (25553760).

Almost surely, 2^201621983 is an apocalyptic number.

201621983 is a deficient number, since it is larger than the sum of its proper divisors (2808097).

201621983 is a wasteful number, since it uses less digits than its factorization.

201621983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3277.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 201621983 is about 14199.3655844196. The cubic root of 201621983 is about 586.3801954872.

The spelling of 201621983 in words is "two hundred one million, six hundred twenty-one thousand, nine hundred eighty-three".