68828149 has 4 divisors (see below), whose sum is σ = 74122636. Its totient is φ = 63533664.

The previous prime is 68828143. The next prime is 68828171. The reversal of 68828149 is 94182886.

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 41860900 + 26967249 = 6470^2 + 5193^2 .

It is a cyclic number.

It is not a de Polignac number, because 68828149 - 2³ = 68828141 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 68828099 and 68828108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68828141) 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, 2647224 + ... + 2647249.

It is an arithmetic number, because the mean of its divisors is an integer number (18530659).

Almost surely, 2^68828149 is an apocalyptic number.

It is an amenable number.

68828149 is a deficient number, since it is larger than the sum of its proper divisors (5294487).

68828149 is a wasteful number, since it uses less digits than its factorization.

68828149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5294486.

The product of its digits is 221184, while the sum is 46.

The square root of 68828149 is about 8296.2731994553. The cubic root of 68828149 is about 409.8157986758.

The spelling of 68828149 in words is "sixty-eight million, eight hundred twenty-eight thousand, one hundred forty-nine".