1172772643 has 4 divisors (see below), whose sum is σ = 1340311600. Its totient is φ = 1005233688.

The previous prime is 1172772631. The next prime is 1172772703. The reversal of 1172772643 is 3462772711.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3462772711 = 41 ⋅84457871.

It is a cyclic number.

It is not a de Polignac number, because 1172772643 - 2⁵ = 1172772611 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1172772596 and 1172772605.

It is not an unprimeable number, because it can be changed into a prime (1172772343) 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, 83769468 + ... + 83769481.

It is an arithmetic number, because the mean of its divisors is an integer number (335077900).

Almost surely, 2^1172772643 is an apocalyptic number.

1172772643 is a deficient number, since it is larger than the sum of its proper divisors (167538957).

1172772643 is an equidigital number, since it uses as much as digits as its factorization.

1172772643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167538956.

The product of its digits is 98784, while the sum is 40.

The square root of 1172772643 is about 34245.7682495225. The cubic root of 1172772643 is about 1054.5599545427.

The spelling of 1172772643 in words is "one billion, one hundred seventy-two million, seven hundred seventy-two thousand, six hundred forty-three".