201091663 has 2 divisors, whose sum is σ = 201091664. Its totient is φ = 201091662.

The previous prime is 201091621. The next prime is 201091697. The reversal of 201091663 is 366190102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 201091663 - 2²¹ = 198994511 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201091603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100545831 + 100545832.

It is an arithmetic number, because the mean of its divisors is an integer number (100545832).

Almost surely, 2^201091663 is an apocalyptic number.

201091663 is a deficient number, since it is larger than the sum of its proper divisors (1).

201091663 is an equidigital number, since it uses as much as digits as its factorization.

201091663 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 201091663 is about 14180.6792150447. The cubic root of 201091663 is about 585.8656315759.

The spelling of 201091663 in words is "two hundred one million, ninety-one thousand, six hundred sixty-three".