1201731563 has 2 divisors, whose sum is σ = 1201731564. Its totient is φ = 1201731562.

The previous prime is 1201731541. The next prime is 1201731569. The reversal of 1201731563 is 3651371021.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1201731563 - 2¹⁰ = 1201730539 is a prime.

It is not a weakly prime, because it can be changed into another prime (1201731569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600865781 + 600865782.

It is an arithmetic number, because the mean of its divisors is an integer number (600865782).

Almost surely, 2^1201731563 is an apocalyptic number.

1201731563 is a deficient number, since it is larger than the sum of its proper divisors (1).

1201731563 is an equidigital number, since it uses as much as digits as its factorization.

1201731563 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3780, while the sum is 29.

The square root of 1201731563 is about 34666.0001009635. Note that the first 3 decimals coincide. The cubic root of 1201731563 is about 1063.1694513823.

The spelling of 1201731563 in words is "one billion, two hundred one million, seven hundred thirty-one thousand, five hundred sixty-three".