1166273897 has 4 divisors (see below), whose sum is σ = 1166397840. Its totient is φ = 1166149956.

The previous prime is 1166273887. The next prime is 1166273923. The reversal of 1166273897 is 7983726611.

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.

It is a cyclic number.

It is not a de Polignac number, because 1166273897 - 2¹² = 1166269801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1166273807) 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, 46583 + ... + 67100.

It is an arithmetic number, because the mean of its divisors is an integer number (291599460).

Almost surely, 2^1166273897 is an apocalyptic number.

It is an amenable number.

1166273897 is a deficient number, since it is larger than the sum of its proper divisors (123943).

1166273897 is a wasteful number, since it uses less digits than its factorization.

1166273897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123942.

The product of its digits is 762048, while the sum is 50.

The square root of 1166273897 is about 34150.7525100107. The cubic root of 1166273897 is about 1052.6084494709.

The spelling of 1166273897 in words is "one billion, one hundred sixty-six million, two hundred seventy-three thousand, eight hundred ninety-seven".