201783142697 has 2 divisors, whose sum is σ = 201783142698. Its totient is φ = 201783142696.

The previous prime is 201783142669. The next prime is 201783142703. The reversal of 201783142697 is 796241387102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 106338601216 + 95444541481 = 326096^2 + 308941^2 .

It is a cyclic number.

It is not a de Polignac number, because 201783142697 - 2⁶ = 201783142633 is a prime.

It is not a weakly prime, because it can be changed into another prime (201783142607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100891571348 + 100891571349.

It is an arithmetic number, because the mean of its divisors is an integer number (100891571349).

Almost surely, 2^201783142697 is an apocalyptic number.

It is an amenable number.

201783142697 is a deficient number, since it is larger than the sum of its proper divisors (1).

201783142697 is an equidigital number, since it uses as much as digits as its factorization.

201783142697 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1016064, while the sum is 50.

The spelling of 201783142697 in words is "two hundred one billion, seven hundred eighty-three million, one hundred forty-two thousand, six hundred ninety-seven".