1231170799 has 4 divisors (see below), whose sum is σ = 1239324400. Its totient is φ = 1223017200.

The previous prime is 1231170793. The next prime is 1231170817. The reversal of 1231170799 is 9970711321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9970711321 = 41 ⋅243188081.

It is a cyclic number.

It is not a de Polignac number, because 1231170799 - 2¹⁷ = 1231039727 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 (1231170793) 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, 4076574 + ... + 4076875.

It is an arithmetic number, because the mean of its divisors is an integer number (309831100).

Almost surely, 2^1231170799 is an apocalyptic number.

1231170799 is a deficient number, since it is larger than the sum of its proper divisors (8153601).

1231170799 is an equidigital number, since it uses as much as digits as its factorization.

1231170799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8153600.

The product of its (nonzero) digits is 23814, while the sum is 40.

The square root of 1231170799 is about 35088.0435333747. The cubic root of 1231170799 is about 1071.7811191639.

The spelling of 1231170799 in words is "one billion, two hundred thirty-one million, one hundred seventy thousand, seven hundred ninety-nine".