68793561 has 12 divisors (see below), whose sum is σ = 99517860. Its totient is φ = 45793440.

The previous prime is 68793559. The next prime is 68793589. The reversal of 68793561 is 16539786.

It is a happy number.

68793561 is a `hidden beast` number, since 6 + 87 + 9 + 3 + 561 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 14107536 + 54686025 = 3756^2 + 7395^2 .

It is not a de Polignac number, because 68793561 - 2¹ = 68793559 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68793551) 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 11 ways as a sum of consecutive naturals, for example, 991 + ... + 11771.

It is an arithmetic number, because the mean of its divisors is an integer number (8293155).

Almost surely, 2^68793561 is an apocalyptic number.

It is an amenable number.

68793561 is a deficient number, since it is larger than the sum of its proper divisors (30724299).

68793561 is a wasteful number, since it uses less digits than its factorization.

68793561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11496 (or 11493 counting only the distinct ones).

The product of its digits is 272160, while the sum is 45.

The square root of 68793561 is about 8294.1883870575. The cubic root of 68793561 is about 409.7471393452.

It can be divided in two parts, 6879 and 3561, that added together give a triangular number (10440 = T₁₄₄).

The spelling of 68793561 in words is "sixty-eight million, seven hundred ninety-three thousand, five hundred sixty-one".