68819439 has 16 divisors (see below), whose sum is σ = 99730400. Its totient is φ = 41959296.

The previous prime is 68819423. The next prime is 68819447. The reversal of 68819439 is 93491886.

It is not a de Polignac number, because 68819439 - 2⁴ = 68819423 is a prime.

It is a super-2 number, since 2×68819439² = 9472230368549442, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68819419) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3844 + ... + 12345.

It is an arithmetic number, because the mean of its divisors is an integer number (6233150).

Almost surely, 2^68819439 is an apocalyptic number.

68819439 is a deficient number, since it is larger than the sum of its proper divisors (30910961).

68819439 is a wasteful number, since it uses less digits than its factorization.

68819439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16314.

The product of its digits is 373248, while the sum is 48.

The square root of 68819439 is about 8295.7482483499. The cubic root of 68819439 is about 409.7985109515.

The spelling of 68819439 in words is "sixty-eight million, eight hundred nineteen thousand, four hundred thirty-nine".