201956393783 has 2 divisors, whose sum is σ = 201956393784. Its totient is φ = 201956393782.

The previous prime is 201956393767. The next prime is 201956393789. The reversal of 201956393783 is 387393659102.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 201956393783 - 2⁴ = 201956393767 is a prime.

It is a super-2 number, since 2×201956393783² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201956393789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100978196891 + 100978196892.

It is an arithmetic number, because the mean of its divisors is an integer number (100978196892).

Almost surely, 2^201956393783 is an apocalyptic number.

201956393783 is a deficient number, since it is larger than the sum of its proper divisors (1).

201956393783 is an equidigital number, since it uses as much as digits as its factorization.

201956393783 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7348320, while the sum is 56.

The spelling of 201956393783 in words is "two hundred one billion, nine hundred fifty-six million, three hundred ninety-three thousand, seven hundred eighty-three".