1161807979 has 2 divisors, whose sum is σ = 1161807980. Its totient is φ = 1161807978.

The previous prime is 1161807973. The next prime is 1161808027. The reversal of 1161807979 is 9797081611.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1161807979 - 2³ = 1161807971 is a prime.

It is not a weakly prime, because it can be changed into another prime (1161807971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 580903989 + 580903990.

It is an arithmetic number, because the mean of its divisors is an integer number (580903990).

Almost surely, 2^1161807979 is an apocalyptic number.

1161807979 is a deficient number, since it is larger than the sum of its proper divisors (1).

1161807979 is an equidigital number, since it uses as much as digits as its factorization.

1161807979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 190512, while the sum is 49.

The square root of 1161807979 is about 34085.3044434108. The cubic root of 1161807979 is about 1051.2631748483.

The spelling of 1161807979 in words is "one billion, one hundred sixty-one million, eight hundred seven thousand, nine hundred seventy-nine".