68249817 has 32 divisors (see below), whose sum is σ = 105896960. Its totient is φ = 43390080.

The previous prime is 68249813. The next prime is 68249833. The reversal of 68249817 is 71894286.

It is not a de Polignac number, because 68249817 - 2² = 68249813 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68249813) 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 31 ways as a sum of consecutive naturals, for example, 60543 + ... + 61659.

It is an arithmetic number, because the mean of its divisors is an integer number (3309280).

Almost surely, 2^68249817 is an apocalyptic number.

It is an amenable number.

68249817 is a deficient number, since it is larger than the sum of its proper divisors (37647143).

68249817 is a wasteful number, since it uses less digits than its factorization.

68249817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1230 (or 1224 counting only the distinct ones).

The product of its digits is 193536, while the sum is 45.

The square root of 68249817 is about 8261.3447452579. The cubic root of 68249817 is about 408.6647360240.

It can be divided in two parts, 6824 and 9817, that added together give a square (16641 = 129²).

The spelling of 68249817 in words is "sixty-eight million, two hundred forty-nine thousand, eight hundred seventeen".