1768938977 has 4 divisors (see below), whose sum is σ = 1905011220. Its totient is φ = 1632866736.

The previous prime is 1768938959. The next prime is 1768938979. The reversal of 1768938977 is 7798398671.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1224370081 + 544568896 = 34991^2 + 23336^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1768938977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1768938979) 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, 68036102 + ... + 68036127.

It is an arithmetic number, because the mean of its divisors is an integer number (476252805).

Almost surely, 2^1768938977 is an apocalyptic number.

It is an amenable number.

1768938977 is a deficient number, since it is larger than the sum of its proper divisors (136072243).

1768938977 is a wasteful number, since it uses less digits than its factorization.

1768938977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136072242.

The product of its digits is 32006016, while the sum is 65.

The square root of 1768938977 is about 42058.7562464702. The cubic root of 1768938977 is about 1209.4027462487.

The spelling of 1768938977 in words is "one billion, seven hundred sixty-eight million, nine hundred thirty-eight thousand, nine hundred seventy-seven".