201949 has 6 divisors (see below), whose sum is σ = 222110. Its totient is φ = 183480.

The previous prime is 201947. The next prime is 201953. The reversal of 201949 is 949102.

It can be written as a sum of positive squares in only one way, i.e., 174724 + 27225 = 418^2 + 165^2 .

It is not a de Polignac number, because 201949 - 2¹ = 201947 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 (201947) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 714 + ... + 955.

2²⁰¹⁹⁴⁹ is an apocalyptic number.

It is an amenable number.

201949 is a deficient number, since it is larger than the sum of its proper divisors (20161).

201949 is a wasteful number, since it uses less digits than its factorization.

201949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1691 (or 1680 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 201949 is about 449.3873607479. The cubic root of 201949 is about 58.6697047038.

The spelling of 201949 in words is "two hundred one thousand, nine hundred forty-nine".