68329915 has 4 divisors (see below), whose sum is σ = 81995904. Its totient is φ = 54663928.

The previous prime is 68329901. The next prime is 68329931. The reversal of 68329915 is 51992386.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 51992386 = 2 ⋅25996193.

It is a cyclic number.

It is not a de Polignac number, because 68329915 - 2¹³ = 68321723 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6832987 + ... + 6832996.

It is an arithmetic number, because the mean of its divisors is an integer number (20498976).

Almost surely, 2^68329915 is an apocalyptic number.

68329915 is a deficient number, since it is larger than the sum of its proper divisors (13665989).

68329915 is a wasteful number, since it uses less digits than its factorization.

68329915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13665988.

The product of its digits is 116640, while the sum is 43.

The square root of 68329915 is about 8266.1910817498. The cubic root of 68329915 is about 408.8245431980.

It can be divided in two parts, 6832991 and 5, that added together give a square (6832996 = 2614²).

The spelling of 68329915 in words is "sixty-eight million, three hundred twenty-nine thousand, nine hundred fifteen".