1165724867 has 4 divisors (see below), whose sum is σ = 1234296936. Its totient is φ = 1097152800.

The previous prime is 1165724821. The next prime is 1165724881. The reversal of 1165724867 is 7684275611.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7684275611 = 137 ⋅56089603.

It is not a de Polignac number, because 1165724867 - 2¹⁰ = 1165723843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1165724887) 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, 34286009 + ... + 34286042.

It is an arithmetic number, because the mean of its divisors is an integer number (308574234).

Almost surely, 2^1165724867 is an apocalyptic number.

1165724867 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

1165724867 is a deficient number, since it is larger than the sum of its proper divisors (68572069).

1165724867 is an equidigital number, since it uses as much as digits as its factorization.

1165724867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68572068.

The product of its digits is 564480, while the sum is 47.

The square root of 1165724867 is about 34142.7132343052. The cubic root of 1165724867 is about 1052.4432497616.

The spelling of 1165724867 in words is "one billion, one hundred sixty-five million, seven hundred twenty-four thousand, eight hundred sixty-seven".