68898993 has 16 divisors (see below), whose sum is σ = 93885696. Its totient is φ = 44928000.

The previous prime is 68898971. The next prime is 68899013. The reversal of 68898993 is 39989886.

It is not a de Polignac number, because 68898993 - 2⁹ = 68898481 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68898923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91368 + ... + 92118.

It is an arithmetic number, because the mean of its divisors is an integer number (5867856).

Almost surely, 2^68898993 is an apocalyptic number.

It is an amenable number.

68898993 is a deficient number, since it is larger than the sum of its proper divisors (24986703).

68898993 is a wasteful number, since it uses less digits than its factorization.

68898993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1384.

The product of its digits is 6718464, while the sum is 60.

The square root of 68898993 is about 8300.5417293090. The cubic root of 68898993 is about 409.9563566473.

It can be divided in two parts, 688 and 98993, that added together give a triangular number (99681 = T₄₄₆).

The spelling of 68898993 in words is "sixty-eight million, eight hundred ninety-eight thousand, nine hundred ninety-three".