1189947403077 has 4 divisors (see below), whose sum is σ = 1586596537440. Its totient is φ = 793298268716.

The previous prime is 1189947402989. The next prime is 1189947403081. The reversal of 1189947403077 is 7703047499811.

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 1189947403077 - 2²⁰ = 1189946354501 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1189947403077.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1189947403087) 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, 198324567177 + ... + 198324567182.

It is an arithmetic number, because the mean of its divisors is an integer number (396649134360).

Almost surely, 2^{1189947403077} is an apocalyptic number.

It is an amenable number.

1189947403077 is a deficient number, since it is larger than the sum of its proper divisors (396649134363).

1189947403077 is an equidigital number, since it uses as much as digits as its factorization.

1189947403077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 396649134362.

The product of its (nonzero) digits is 10668672, while the sum is 60.

The spelling of 1189947403077 in words is "one trillion, one hundred eighty-nine billion, nine hundred forty-seven million, four hundred three thousand, seventy-seven".