201668977 has 4 divisors (see below), whose sum is σ = 213531876. Its totient is φ = 189806080.

The previous prime is 201668959. The next prime is 201668993. The reversal of 201668977 is 779866102.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 156725361 + 44943616 = 12519^2 + 6704^2 .

It is a cyclic number.

It is not a de Polignac number, because 201668977 - 2⁷ = 201668849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201668177) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5931424 + ... + 5931457.

It is an arithmetic number, because the mean of its divisors is an integer number (53382969).

Almost surely, 2^201668977 is an apocalyptic number.

It is an amenable number.

201668977 is a deficient number, since it is larger than the sum of its proper divisors (11862899).

201668977 is a wasteful number, since it uses less digits than its factorization.

201668977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11862898.

The product of its (nonzero) digits is 254016, while the sum is 46.

The square root of 201668977 is about 14201.0202802475. The cubic root of 201668977 is about 586.4257497299.

The spelling of 201668977 in words is "two hundred one million, six hundred sixty-eight thousand, nine hundred seventy-seven".