1161897199 has 8 divisors (see below), whose sum is σ = 1218691008. Its totient is φ = 1106439840.

The previous prime is 1161897193. The next prime is 1161897203. The reversal of 1161897199 is 9917981611.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1161897199 - 2⁷ = 1161897071 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161897193) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 332332 + ... + 335809.

It is an arithmetic number, because the mean of its divisors is an integer number (152336376).

Almost surely, 2^1161897199 is an apocalyptic number.

1161897199 is a deficient number, since it is larger than the sum of its proper divisors (56793809).

1161897199 is an equidigital number, since it uses as much as digits as its factorization.

1161897199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 668225.

The product of its digits is 244944, while the sum is 52.

The square root of 1161897199 is about 34086.6131934518. The cubic root of 1161897199 is about 1051.2900844298.

The spelling of 1161897199 in words is "one billion, one hundred sixty-one million, eight hundred ninety-seven thousand, one hundred ninety-nine".