1166897941 has 4 divisors (see below), whose sum is σ = 1272979584. Its totient is φ = 1060816300.

The previous prime is 1166897933. The next prime is 1166897959. The reversal of 1166897941 is 1497986611.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1497986611 = 11 ⋅136180601.

It is a cyclic number.

It is not a de Polignac number, because 1166897941 - 2³ = 1166897933 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 (1166897981) 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, 53040805 + ... + 53040826.

It is an arithmetic number, because the mean of its divisors is an integer number (318244896).

Almost surely, 2^1166897941 is an apocalyptic number.

1166897941 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1166897941 is a deficient number, since it is larger than the sum of its proper divisors (106081643).

1166897941 is a wasteful number, since it uses less digits than its factorization.

1166897941 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106081642.

The product of its digits is 653184, while the sum is 52.

The square root of 1166897941 is about 34159.8878950151. The cubic root of 1166897941 is about 1052.7961574826.

The spelling of 1166897941 in words is "one billion, one hundred sixty-six million, eight hundred ninety-seven thousand, nine hundred forty-one".