1205768077 has 4 divisors (see below), whose sum is σ = 1258192800. Its totient is φ = 1153343356.

The previous prime is 1205768041. The next prime is 1205768093. The reversal of 1205768077 is 7708675021.

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, and also an emirpimes, since its reverse is a distinct semiprime: 7708675021 = 1759 ⋅4382419.

It is a cyclic number.

It is not a de Polignac number, because 1205768077 - 2¹⁵ = 1205735309 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 (1205768477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26212327 + ... + 26212372.

It is an arithmetic number, because the mean of its divisors is an integer number (314548200).

Almost surely, 2^1205768077 is an apocalyptic number.

It is an amenable number.

1205768077 is a deficient number, since it is larger than the sum of its proper divisors (52424723).

1205768077 is an equidigital number, since it uses as much as digits as its factorization.

1205768077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52424722.

The product of its (nonzero) digits is 164640, while the sum is 43.

The square root of 1205768077 is about 34724.1713652032. The cubic root of 1205768077 is about 1064.3584863069.

The spelling of 1205768077 in words is "one billion, two hundred five million, seven hundred sixty-eight thousand, seventy-seven".