201691694 has 8 divisors (see below), whose sum is σ = 312969960. Its totient is φ = 97368376.

The previous prime is 201691691. The next prime is 201691717. The reversal of 201691694 is 496196102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201691691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1738664 + ... + 1738779.

It is an arithmetic number, because the mean of its divisors is an integer number (39121245).

Almost surely, 2^201691694 is an apocalyptic number.

201691694 is a deficient number, since it is larger than the sum of its proper divisors (111278266).

201691694 is a wasteful number, since it uses less digits than its factorization.

201691694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3477474.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 201691694 is about 14201.8200946217. The cubic root of 201691694 is about 586.4477682109.

The spelling of 201691694 in words is "two hundred one million, six hundred ninety-one thousand, six hundred ninety-four".