68090777 has 4 divisors (see below), whose sum is σ = 68273700. Its totient is φ = 67907856.

The previous prime is 68090773. The next prime is 68090783. The reversal of 68090777 is 77709086.

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 41165056 + 26925721 = 6416^2 + 5189^2 .

It is a cyclic number.

It is not a de Polignac number, because 68090777 - 2² = 68090773 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68090773) 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, 90902 + ... + 91647.

It is an arithmetic number, because the mean of its divisors is an integer number (17068425).

Almost surely, 2^68090777 is an apocalyptic number.

It is an amenable number.

68090777 is a deficient number, since it is larger than the sum of its proper divisors (182923).

68090777 is a wasteful number, since it uses less digits than its factorization.

68090777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182922.

The product of its (nonzero) digits is 148176, while the sum is 44.

The square root of 68090777 is about 8251.7135796148. The cubic root of 68090777 is about 408.3470570796.

The spelling of 68090777 in words is "sixty-eight million, ninety thousand, seven hundred seventy-seven".