68307861 has 16 divisors (see below), whose sum is σ = 96600960. Its totient is φ = 42841920.

The previous prime is 68307851. The next prime is 68307871. The reversal of 68307861 is 16870386.

It is an interprime number because it is at equal distance from previous prime (68307851) and next prime (68307871).

It is not a de Polignac number, because 68307861 - 2¹⁷ = 68176789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68307821) 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 15 ways as a sum of consecutive naturals, for example, 3906 + ... + 12323.

It is an arithmetic number, because the mean of its divisors is an integer number (6037560).

Almost surely, 2^68307861 is an apocalyptic number.

68307861 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

It is an amenable number.

68307861 is a deficient number, since it is larger than the sum of its proper divisors (28293099).

68307861 is a wasteful number, since it uses less digits than its factorization.

68307861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16316.

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 68307861 is about 8264.8569860585. The cubic root of 68307861 is about 408.7805547210.

The spelling of 68307861 in words is "sixty-eight million, three hundred seven thousand, eight hundred sixty-one".