1195220791 has 4 divisors (see below), whose sum is σ = 1197506632. Its totient is φ = 1192934952.

The previous prime is 1195220777. The next prime is 1195220801. The reversal of 1195220791 is 1970225911.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1970225911 = 373 ⋅5282107.

It is a cyclic number.

It is not a de Polignac number, because 1195220791 - 2⁵ = 1195220759 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1195220791.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1195220701) 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, 1142136 + ... + 1143181.

It is an arithmetic number, because the mean of its divisors is an integer number (299376658).

Almost surely, 2^1195220791 is an apocalyptic number.

1195220791 is a deficient number, since it is larger than the sum of its proper divisors (2285841).

1195220791 is an equidigital number, since it uses as much as digits as its factorization.

1195220791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2285840.

The product of its (nonzero) digits is 11340, while the sum is 37.

The square root of 1195220791 is about 34571.9653910506. The cubic root of 1195220791 is about 1061.2459512434.

The spelling of 1195220791 in words is "one billion, one hundred ninety-five million, two hundred twenty thousand, seven hundred ninety-one".