201839956 has 6 divisors (see below), whose sum is σ = 353219930. Its totient is φ = 100919976.

The previous prime is 201839947. The next prime is 201839959. The reversal of 201839956 is 659938102.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 128051856 + 73788100 = 11316^2 + 8590^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201839959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25229991 + ... + 25229998.

Almost surely, 2^201839956 is an apocalyptic number.

It is an amenable number.

201839956 is a deficient number, since it is larger than the sum of its proper divisors (151379974).

201839956 is a wasteful number, since it uses less digits than its factorization.

201839956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50459993 (or 50459991 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 43.

The square root of 201839956 is about 14207.0389596144. The cubic root of 201839956 is about 586.5914307502.

The spelling of 201839956 in words is "two hundred one million, eight hundred thirty-nine thousand, nine hundred fifty-six".