201690827 has 16 divisors (see below), whose sum is σ = 222923232. Its totient is φ = 181336320.

The previous prime is 201690823. The next prime is 201690857. The reversal of 201690827 is 728096102.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 201690827 - 2² = 201690823 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201690823) 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 15 ways as a sum of consecutive naturals, for example, 83663 + ... + 86039.

It is an arithmetic number, because the mean of its divisors is an integer number (13932702).

Almost surely, 2^201690827 is an apocalyptic number.

201690827 is a deficient number, since it is larger than the sum of its proper divisors (21232405).

201690827 is a wasteful number, since it uses less digits than its factorization.

201690827 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2558.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 201690827 is about 14201.7895703323. The cubic root of 201690827 is about 586.4469279004.

The spelling of 201690827 in words is "two hundred one million, six hundred ninety thousand, eight hundred twenty-seven".