1171678099 has 4 divisors (see below), whose sum is σ = 1171775440. Its totient is φ = 1171580760.

The previous prime is 1171678093. The next prime is 1171678117. The reversal of 1171678099 is 9908761711.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 9908761711 = 859 ⋅11535229.

It is a cyclic number.

It is not a de Polignac number, because 1171678099 - 2³ = 1171678091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1171678091) 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, 27564 + ... + 55705.

It is an arithmetic number, because the mean of its divisors is an integer number (292943860).

Almost surely, 2^1171678099 is an apocalyptic number.

1171678099 is a deficient number, since it is larger than the sum of its proper divisors (97341).

1171678099 is an equidigital number, since it uses as much as digits as its factorization.

1171678099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97340.

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

The square root of 1171678099 is about 34229.7838000768. The cubic root of 1171678099 is about 1054.2317802361.

The spelling of 1171678099 in words is "one billion, one hundred seventy-one million, six hundred seventy-eight thousand, ninety-nine".