1191842801 has 2 divisors, whose sum is σ = 1191842802. Its totient is φ = 1191842800.

The previous prime is 1191842791. The next prime is 1191842807. The reversal of 1191842801 is 1082481911.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 686492401 + 505350400 = 26201^2 + 22480^2 .

It is a cyclic number.

It is not a de Polignac number, because 1191842801 - 2⁶ = 1191842737 is a prime.

It is not a weakly prime, because it can be changed into another prime (1191842807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 595921400 + 595921401.

It is an arithmetic number, because the mean of its divisors is an integer number (595921401).

Almost surely, 2^1191842801 is an apocalyptic number.

It is an amenable number.

1191842801 is a deficient number, since it is larger than the sum of its proper divisors (1).

1191842801 is an equidigital number, since it uses as much as digits as its factorization.

1191842801 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4608, while the sum is 35.

The square root of 1191842801 is about 34523.0763548094. The cubic root of 1191842801 is about 1060.2452265790.

The spelling of 1191842801 in words is "one billion, one hundred ninety-one million, eight hundred forty-two thousand, eight hundred one".