1963728461 has 2 divisors, whose sum is σ = 1963728462. Its totient is φ = 1963728460.

The previous prime is 1963728407. The next prime is 1963728539. The reversal of 1963728461 is 1648273691.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 989102500 + 974625961 = 31450^2 + 31219^2 .

It is a cyclic number.

It is not a de Polignac number, because 1963728461 - 2¹⁸ = 1963466317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1963728061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 981864230 + 981864231.

It is an arithmetic number, because the mean of its divisors is an integer number (981864231).

Almost surely, 2^1963728461 is an apocalyptic number.

It is an amenable number.

1963728461 is a deficient number, since it is larger than the sum of its proper divisors (1).

1963728461 is an equidigital number, since it uses as much as digits as its factorization.

1963728461 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 435456, while the sum is 47.

The square root of 1963728461 is about 44313.9759105409. The cubic root of 1963728461 is about 1252.2579904075.

The spelling of 1963728461 in words is "one billion, nine hundred sixty-three million, seven hundred twenty-eight thousand, four hundred sixty-one".