201139076491 has 2 divisors, whose sum is σ = 201139076492. Its totient is φ = 201139076490.

The previous prime is 201139076473. The next prime is 201139076503. The reversal of 201139076491 is 194670931102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 201139076491 - 2¹¹ = 201139074443 is a prime.

It is not a weakly prime, because it can be changed into another prime (201139076431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100569538245 + 100569538246.

It is an arithmetic number, because the mean of its divisors is an integer number (100569538246).

Almost surely, 2^201139076491 is an apocalyptic number.

201139076491 is a deficient number, since it is larger than the sum of its proper divisors (1).

201139076491 is an equidigital number, since it uses as much as digits as its factorization.

201139076491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81648, while the sum is 43.

The spelling of 201139076491 in words is "two hundred one billion, one hundred thirty-nine million, seventy-six thousand, four hundred ninety-one".