1161330761 has 2 divisors, whose sum is σ = 1161330762. Its totient is φ = 1161330760.

The previous prime is 1161330757. The next prime is 1161330791. The reversal of 1161330761 is 1670331611.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 663371536 + 497959225 = 25756^2 + 22315^2 .

It is a cyclic number.

It is not a de Polignac number, because 1161330761 - 2² = 1161330757 is a prime.

It is not a weakly prime, because it can be changed into another prime (1161330701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 580665380 + 580665381.

It is an arithmetic number, because the mean of its divisors is an integer number (580665381).

Almost surely, 2^1161330761 is an apocalyptic number.

It is an amenable number.

1161330761 is a deficient number, since it is larger than the sum of its proper divisors (1).

1161330761 is an equidigital number, since it uses as much as digits as its factorization.

1161330761 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2268, while the sum is 29.

The square root of 1161330761 is about 34078.3033761952. The cubic root of 1161330761 is about 1051.1192180660.

The spelling of 1161330761 in words is "one billion, one hundred sixty-one million, three hundred thirty thousand, seven hundred sixty-one".