68819137 has 4 divisors (see below), whose sum is σ = 68835780. Its totient is φ = 68802496.

The previous prime is 68819131. The next prime is 68819143. The reversal of 68819137 is 73191886.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 73191886 = 2 ⋅36595943.

It is an interprime number because it is at equal distance from previous prime (68819131) and next prime (68819143).

It can be written as a sum of positive squares in 2 ways, for example, as 39992976 + 28826161 = 6324^2 + 5369^2 .

It is a cyclic number.

It is not a de Polignac number, because 68819137 - 2³ = 68819129 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 68819093 and 68819102.

It is not an unprimeable number, because it can be changed into a prime (68819131) 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, 3189 + ... + 12157.

It is an arithmetic number, because the mean of its divisors is an integer number (17208945).

Almost surely, 2^68819137 is an apocalyptic number.

It is an amenable number.

68819137 is a deficient number, since it is larger than the sum of its proper divisors (16643).

68819137 is an equidigital number, since it uses as much as digits as its factorization.

68819137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16642.

The product of its digits is 72576, while the sum is 43.

The square root of 68819137 is about 8295.7300462346. The cubic root of 68819137 is about 409.7979115117.

The spelling of 68819137 in words is "sixty-eight million, eight hundred nineteen thousand, one hundred thirty-seven".