68698751 has 16 divisors (see below), whose sum is σ = 81505440. Its totient is φ = 57185280.

The previous prime is 68698741. The next prime is 68698753. The reversal of 68698751 is 15789686.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-68698751 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 68698751.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68698753) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1955 + ... + 11883.

It is an arithmetic number, because the mean of its divisors is an integer number (5094090).

Almost surely, 2^68698751 is an apocalyptic number.

68698751 is a deficient number, since it is larger than the sum of its proper divisors (12806689).

68698751 is a wasteful number, since it uses less digits than its factorization.

68698751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9994.

The product of its digits is 725760, while the sum is 50.

The square root of 68698751 is about 8288.4709687614. The cubic root of 68698751 is about 409.5588175218.

The spelling of 68698751 in words is "sixty-eight million, six hundred ninety-eight thousand, seven hundred fifty-one".