68051387 has 4 divisors (see below), whose sum is σ = 68070000. Its totient is φ = 68032776.

The previous prime is 68051381. The next prime is 68051393. The reversal of 68051387 is 78315086.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (68051381) and next prime (68051393).

It is a cyclic number.

It is not a de Polignac number, because 68051387 - 2¹⁶ = 67985851 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 68051387.

It is not an unprimeable number, because it can be changed into a prime (68051381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1808 + ... + 11805.

It is an arithmetic number, because the mean of its divisors is an integer number (17017500).

Almost surely, 2^68051387 is an apocalyptic number.

68051387 is a deficient number, since it is larger than the sum of its proper divisors (18613).

68051387 is a wasteful number, since it uses less digits than its factorization.

68051387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18612.

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 68051387 is about 8249.3264573540. The cubic root of 68051387 is about 408.2682999952.

It can be divided in two parts, 6805 and 1387, that added together give a 13-th power (8192 = 2¹³).

The spelling of 68051387 in words is "sixty-eight million, fifty-one thousand, three hundred eighty-seven".