1161877111 has 4 divisors (see below), whose sum is σ = 1174932000. Its totient is φ = 1148822224.

The previous prime is 1161877109. The next prime is 1161877133. The reversal of 1161877111 is 1117781611.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1117781611 = 1021 ⋅1094791.

It is a cyclic number.

It is not a de Polignac number, because 1161877111 - 2¹ = 1161877109 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 (1161877511) 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, 6527311 + ... + 6527488.

It is an arithmetic number, because the mean of its divisors is an integer number (293733000).

Almost surely, 2^1161877111 is an apocalyptic number.

1161877111 is a deficient number, since it is larger than the sum of its proper divisors (13054889).

1161877111 is an equidigital number, since it uses as much as digits as its factorization.

1161877111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13054888.

The product of its digits is 2352, while the sum is 34.

The square root of 1161877111 is about 34086.3185310470. The cubic root of 1161877111 is about 1051.2840258224.

The spelling of 1161877111 in words is "one billion, one hundred sixty-one million, eight hundred seventy-seven thousand, one hundred eleven".