1191763541 has 2 divisors, whose sum is σ = 1191763542. Its totient is φ = 1191763540.

The previous prime is 1191763493. The next prime is 1191763553. The reversal of 1191763541 is 1453671911.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 891261316 + 300502225 = 29854^2 + 17335^2 .

It is a cyclic number.

It is not a de Polignac number, because 1191763541 - 2⁶ = 1191763477 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1191763495 and 1191763504.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1191763571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 595881770 + 595881771.

It is an arithmetic number, because the mean of its divisors is an integer number (595881771).

Almost surely, 2^1191763541 is an apocalyptic number.

It is an amenable number.

1191763541 is a deficient number, since it is larger than the sum of its proper divisors (1).

1191763541 is an equidigital number, since it uses as much as digits as its factorization.

1191763541 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22680, while the sum is 38.

The square root of 1191763541 is about 34521.9284078975. The cubic root of 1191763541 is about 1060.2217232279.

The spelling of 1191763541 in words is "one billion, one hundred ninety-one million, seven hundred sixty-three thousand, five hundred forty-one".