68992177 has 4 divisors (see below), whose sum is σ = 69767460. Its totient is φ = 68216896.

The previous prime is 68992153. The next prime is 68992199. The reversal of 68992177 is 77129986.

It is a happy number.

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 3964081 + 65028096 = 1991^2 + 8064^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68992177 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 68992177.

It is not an unprimeable number, because it can be changed into a prime (68992127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 387508 + ... + 387685.

It is an arithmetic number, because the mean of its divisors is an integer number (17441865).

Almost surely, 2^68992177 is an apocalyptic number.

It is an amenable number.

68992177 is a deficient number, since it is larger than the sum of its proper divisors (775283).

68992177 is an equidigital number, since it uses as much as digits as its factorization.

68992177 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 775282.

The product of its digits is 381024, while the sum is 49.

The square root of 68992177 is about 8306.1529603060. The cubic root of 68992177 is about 410.1410916355.

It can be divided in two parts, 68992 and 177, that added together give a square (69169 = 263²).

The spelling of 68992177 in words is "sixty-eight million, nine hundred ninety-two thousand, one hundred seventy-seven".