68539489 has 8 divisors (see below), whose sum is σ = 70172928. Its totient is φ = 66913440.

The previous prime is 68539483. The next prime is 68539501. The reversal of 68539489 is 98493586.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 68539489 - 2¹⁹ = 68015201 is a prime.

It is a super-2 number, since 2×68539489² = 9395323104762242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68539483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19884 + ... + 23074.

It is an arithmetic number, because the mean of its divisors is an integer number (8771616).

Almost surely, 2^68539489 is an apocalyptic number.

It is an amenable number.

68539489 is a deficient number, since it is larger than the sum of its proper divisors (1633439).

68539489 is a wasteful number, since it uses less digits than its factorization.

68539489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3695.

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

The square root of 68539489 is about 8278.8579526406. The cubic root of 68539489 is about 409.2420838350.

The spelling of 68539489 in words is "sixty-eight million, five hundred thirty-nine thousand, four hundred eighty-nine".