68939311 has 16 divisors (see below), whose sum is σ = 80179200. Its totient is φ = 58056768.

The previous prime is 68939309. The next prime is 68939329. The reversal of 68939311 is 11393986.

It is not a de Polignac number, because 68939311 - 2¹ = 68939309 is a prime.

It is a Duffinian number.

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68939111) 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, 148666 + ... + 149128.

It is an arithmetic number, because the mean of its divisors is an integer number (5011200).

Almost surely, 2^68939311 is an apocalyptic number.

68939311 is a deficient number, since it is larger than the sum of its proper divisors (11239889).

68939311 is a wasteful number, since it uses less digits than its factorization.

68939311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 798.

The product of its digits is 34992, while the sum is 40.

The square root of 68939311 is about 8302.9700107853. The cubic root of 68939311 is about 410.0363065211.

It can be divided in two parts, 689 and 39311, that added together give a square (40000 = 200²).

The spelling of 68939311 in words is "sixty-eight million, nine hundred thirty-nine thousand, three hundred eleven".