201965947 has 4 divisors (see below), whose sum is σ = 208930320. Its totient is φ = 195001576.

The previous prime is 201965923. The next prime is 201965957. The reversal of 201965947 is 749569102.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 749569102 = 2 ⋅374784551.

It is a cyclic number.

It is not a de Polignac number, because 201965947 - 2¹¹ = 201963899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201965957) 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 in 3 ways as a sum of consecutive naturals, for example, 3482143 + ... + 3482200.

It is an arithmetic number, because the mean of its divisors is an integer number (52232580).

Almost surely, 2^201965947 is an apocalyptic number.

201965947 is a deficient number, since it is larger than the sum of its proper divisors (6964373).

201965947 is an equidigital number, since it uses as much as digits as its factorization.

201965947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6964372.

The product of its (nonzero) digits is 136080, while the sum is 43.

The square root of 201965947 is about 14211.4723726995. The cubic root of 201965947 is about 586.7134579085.

The spelling of 201965947 in words is "two hundred one million, nine hundred sixty-five thousand, nine hundred forty-seven".