201969 has 6 divisors (see below), whose sum is σ = 291746. Its totient is φ = 134640.

The previous prime is 201961. The next prime is 201973. The reversal of 201969 is 969102.

It is a happy number.

201969 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 119025 + 82944 = 345^2 + 288^2 .

It is not a de Polignac number, because 201969 - 2³ = 201961 is a prime.

It is a super-2 number, since 2×201969² = 81582953922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201961) 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, 11212 + ... + 11229.

2²⁰¹⁹⁶⁹ is an apocalyptic number.

It is an amenable number.

201969 is a deficient number, since it is larger than the sum of its proper divisors (89777).

201969 is a wasteful number, since it uses less digits than its factorization.

201969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22447 (or 22444 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 27.

The square root of 201969 is about 449.4096127143. The cubic root of 201969 is about 58.6716414227.

The spelling of 201969 in words is "two hundred one thousand, nine hundred sixty-nine".