68940542 has 16 divisors (see below), whose sum is σ = 119448432. Its totient is φ = 29493120.

The previous prime is 68940541. The next prime is 68940551. The reversal of 68940542 is 24504986.

It is a junction number, because it is equal to n+sod(n) for n = 68940496 and 68940505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68940541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 91793 + ... + 92540.

It is an arithmetic number, because the mean of its divisors is an integer number (7465527).

Almost surely, 2^68940542 is an apocalyptic number.

68940542 is a deficient number, since it is larger than the sum of its proper divisors (50507890).

68940542 is a wasteful number, since it uses less digits than its factorization.

68940542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184363.

The product of its (nonzero) digits is 69120, while the sum is 38.

The square root of 68940542 is about 8303.0441405547. The cubic root of 68940542 is about 410.0387470817.

Subtracting from 68940542 its reverse (24504986), we obtain a square (44435556 = 6666²).

The spelling of 68940542 in words is "sixty-eight million, nine hundred forty thousand, five hundred forty-two".