68947749 has 12 divisors (see below), whose sum is σ = 107252236. Its totient is φ = 42429312.

The previous prime is 68947727. The next prime is 68947759. The reversal of 68947749 is 94774986.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 3629025 + 65318724 = 1905^2 + 8082^2 .

It is not a de Polignac number, because 68947749 - 2⁵ = 68947717 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 68947695 and 68947704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68947759) 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 11 ways as a sum of consecutive naturals, for example, 294532 + ... + 294765.

Almost surely, 2^68947749 is an apocalyptic number.

It is an amenable number.

68947749 is a deficient number, since it is larger than the sum of its proper divisors (38304487).

68947749 is a wasteful number, since it uses less digits than its factorization.

68947749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 589316 (or 589313 counting only the distinct ones).

The product of its digits is 3048192, while the sum is 54.

The square root of 68947749 is about 8303.4781266648. The cubic root of 68947749 is about 410.0530349796.

It can be divided in two parts, 68947 and 749, that added together give a palindrome (69696).

The spelling of 68947749 in words is "sixty-eight million, nine hundred forty-seven thousand, seven hundred forty-nine".