201078689 has 4 divisors (see below), whose sum is σ = 229804224. Its totient is φ = 172353156.

The previous prime is 201078677. The next prime is 201078727. The reversal of 201078689 is 986870102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 201078689 - 2⁸ = 201078433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201078649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14362757 + ... + 14362770.

It is an arithmetic number, because the mean of its divisors is an integer number (57451056).

Almost surely, 2^201078689 is an apocalyptic number.

It is an amenable number.

201078689 is a deficient number, since it is larger than the sum of its proper divisors (28725535).

201078689 is an equidigital number, since it uses as much as digits as its factorization.

201078689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28725534.

The product of its (nonzero) digits is 48384, while the sum is 41.

The square root of 201078689 is about 14180.2217542604. The cubic root of 201078689 is about 585.8530317097.

The spelling of 201078689 in words is "two hundred one million, seventy-eight thousand, six hundred eighty-nine".