1961438753 has 2 divisors, whose sum is σ = 1961438754. Its totient is φ = 1961438752.

The previous prime is 1961438749. The next prime is 1961438771. The reversal of 1961438753 is 3578341691.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1332031009 + 629407744 = 36497^2 + 25088^2 .

It is an emirp because it is prime and its reverse (3578341691) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1961438753 - 2² = 1961438749 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1961438698 and 1961438707.

It is not a weakly prime, because it can be changed into another prime (1961434753) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 980719376 + 980719377.

It is an arithmetic number, because the mean of its divisors is an integer number (980719377).

Almost surely, 2^1961438753 is an apocalyptic number.

It is an amenable number.

1961438753 is a deficient number, since it is larger than the sum of its proper divisors (1).

1961438753 is an equidigital number, since it uses as much as digits as its factorization.

1961438753 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 544320, while the sum is 47.

The square root of 1961438753 is about 44288.1333203376. The cubic root of 1961438753 is about 1251.7710900469.

The spelling of 1961438753 in words is "one billion, nine hundred sixty-one million, four hundred thirty-eight thousand, seven hundred fifty-three".