68398549 has 4 divisors (see below), whose sum is σ = 68818336. Its totient is φ = 67978764.

The previous prime is 68398543. The next prime is 68398571. The reversal of 68398549 is 94589386.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 68398549 - 2¹⁷ = 68267477 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 68398496 and 68398505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68398543) 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, 209649 + ... + 209974.

It is an arithmetic number, because the mean of its divisors is an integer number (17204584).

Almost surely, 2^68398549 is an apocalyptic number.

It is an amenable number.

68398549 is a deficient number, since it is larger than the sum of its proper divisors (419787).

68398549 is a wasteful number, since it uses less digits than its factorization.

68398549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 419786.

The product of its digits is 1866240, while the sum is 52.

The square root of 68398549 is about 8270.3415286190. The cubic root of 68398549 is about 408.9613786978.

The spelling of 68398549 in words is "sixty-eight million, three hundred ninety-eight thousand, five hundred forty-nine".