1161680979 has 4 divisors (see below), whose sum is σ = 1548907976. Its totient is φ = 774453984.

The previous prime is 1161680969. The next prime is 1161681023. The reversal of 1161680979 is 9790861611.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9790861611 = 3 ⋅3263620537.

It is not a de Polignac number, because 1161680979 - 2⁷ = 1161680851 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1161680929) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 193613494 + ... + 193613499.

It is an arithmetic number, because the mean of its divisors is an integer number (387226994).

Almost surely, 2^1161680979 is an apocalyptic number.

1161680979 is a deficient number, since it is larger than the sum of its proper divisors (387226997).

1161680979 is an equidigital number, since it uses as much as digits as its factorization.

1161680979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 387226996.

The product of its (nonzero) digits is 163296, while the sum is 48.

The square root of 1161680979 is about 34083.4414195515. The cubic root of 1161680979 is about 1051.2248680912.

The spelling of 1161680979 in words is "one billion, one hundred sixty-one million, six hundred eighty thousand, nine hundred seventy-nine".