201685493 has 2 divisors, whose sum is σ = 201685494. Its totient is φ = 201685492.

The previous prime is 201685489. The next prime is 201685529. The reversal of 201685493 is 394586102.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 191490244 + 10195249 = 13838^2 + 3193^2 .

It is a cyclic number.

It is not a de Polignac number, because 201685493 - 2² = 201685489 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201685403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100842746 + 100842747.

It is an arithmetic number, because the mean of its divisors is an integer number (100842747).

Almost surely, 2^201685493 is an apocalyptic number.

It is an amenable number.

201685493 is a deficient number, since it is larger than the sum of its proper divisors (1).

201685493 is an equidigital number, since it uses as much as digits as its factorization.

201685493 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 201685493 is about 14201.6017758561. The cubic root of 201685493 is about 586.4417580478.

The spelling of 201685493 in words is "two hundred one million, six hundred eighty-five thousand, four hundred ninety-three".