68536749 has 4 divisors (see below), whose sum is σ = 91382336. Its totient is φ = 45691164.

The previous prime is 68536697. The next prime is 68536751. The reversal of 68536749 is 94763586.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 68536749 - 2⁷ = 68536621 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 68536698 and 68536707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68536649) 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, 11422789 + ... + 11422794.

It is an arithmetic number, because the mean of its divisors is an integer number (22845584).

Almost surely, 2^68536749 is an apocalyptic number.

It is an amenable number.

68536749 is a deficient number, since it is larger than the sum of its proper divisors (22845587).

68536749 is a wasteful number, since it uses less digits than its factorization.

68536749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22845586.

The product of its digits is 1088640, while the sum is 48.

The square root of 68536749 is about 8278.6924692248. The cubic root of 68536749 is about 409.2366303450.

The spelling of 68536749 in words is "sixty-eight million, five hundred thirty-six thousand, seven hundred forty-nine".