1172109899 has 2 divisors, whose sum is σ = 1172109900. Its totient is φ = 1172109898.

The previous prime is 1172109881. The next prime is 1172109901. The reversal of 1172109899 is 9989012711.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1172109899 is a prime.

Together with 1172109901, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1172159899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 586054949 + 586054950.

It is an arithmetic number, because the mean of its divisors is an integer number (586054950).

Almost surely, 2^1172109899 is an apocalyptic number.

1172109899 is a deficient number, since it is larger than the sum of its proper divisors (1).

1172109899 is an equidigital number, since it uses as much as digits as its factorization.

1172109899 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81648, while the sum is 47.

The square root of 1172109899 is about 34236.0905916549. The cubic root of 1172109899 is about 1054.3612701173.

The spelling of 1172109899 in words is "one billion, one hundred seventy-two million, one hundred nine thousand, eight hundred ninety-nine".