68891039 has 8 divisors (see below), whose sum is σ = 79003680. Its totient is φ = 58846176.

The previous prime is 68891027. The next prime is 68891063. The reversal of 68891039 is 93019886.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68891039 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68891099) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14744 + ... + 18845.

It is an arithmetic number, because the mean of its divisors is an integer number (9875460).

Almost surely, 2^68891039 is an apocalyptic number.

68891039 is a deficient number, since it is larger than the sum of its proper divisors (10112641).

68891039 is a wasteful number, since it uses less digits than its factorization.

68891039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33889.

The product of its (nonzero) digits is 93312, while the sum is 44.

The square root of 68891039 is about 8300.0625901255. The cubic root of 68891039 is about 409.9405803241.

The spelling of 68891039 in words is "sixty-eight million, eight hundred ninety-one thousand, thirty-nine".