68939955 has 24 divisors (see below), whose sum is σ = 136567392. Its totient is φ = 31515264.

The previous prime is 68939951. The next prime is 68939963. The reversal of 68939955 is 55993986.

It is not a de Polignac number, because 68939955 - 2² = 68939951 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68939951) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 109114 + ... + 109743.

It is an arithmetic number, because the mean of its divisors is an integer number (5690308).

Almost surely, 2^68939955 is an apocalyptic number.

68939955 is a deficient number, since it is larger than the sum of its proper divisors (67627437).

68939955 is a wasteful number, since it uses less digits than its factorization.

68939955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218875 (or 218872 counting only the distinct ones).

The product of its digits is 2624400, while the sum is 54.

The square root of 68939955 is about 8303.0087919982. The cubic root of 68939955 is about 410.0375833087.

The spelling of 68939955 in words is "sixty-eight million, nine hundred thirty-nine thousand, nine hundred fifty-five".