68534861 has 4 divisors (see below), whose sum is σ = 69200352. Its totient is φ = 67869372.

The previous prime is 68534849. The next prime is 68534867. The reversal of 68534861 is 16843586.

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, and also an emirpimes, since its reverse is a distinct semiprime: 16843586 = 2 ⋅8421793.

It is a cyclic number.

It is not a de Polignac number, because 68534861 - 2¹⁴ = 68518477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68534867) 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 3 ways as a sum of consecutive naturals, for example, 332591 + ... + 332796.

It is an arithmetic number, because the mean of its divisors is an integer number (17300088).

Almost surely, 2^68534861 is an apocalyptic number.

It is an amenable number.

68534861 is a deficient number, since it is larger than the sum of its proper divisors (665491).

68534861 is a wasteful number, since it uses less digits than its factorization.

68534861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 665490.

The product of its digits is 138240, while the sum is 41.

The square root of 68534861 is about 8278.5784407711. The cubic root of 68534861 is about 409.2328725271.

The spelling of 68534861 in words is "sixty-eight million, five hundred thirty-four thousand, eight hundred sixty-one".