68401861 has 4 divisors (see below), whose sum is σ = 74620224. Its totient is φ = 62183500.

The previous prime is 68401849. The next prime is 68401867. The reversal of 68401861 is 16810486.

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 a cyclic number.

It is not a de Polignac number, because 68401861 - 2⁷ = 68401733 is a prime.

It is a super-3 number, since 3×68401861³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68401867) 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, 3109165 + ... + 3109186.

It is an arithmetic number, because the mean of its divisors is an integer number (18655056).

Almost surely, 2^68401861 is an apocalyptic number.

It is an amenable number.

68401861 is a deficient number, since it is larger than the sum of its proper divisors (6218363).

68401861 is a wasteful number, since it uses less digits than its factorization.

68401861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6218362.

The product of its (nonzero) digits is 9216, while the sum is 34.

The square root of 68401861 is about 8270.5417597640. The cubic root of 68401861 is about 408.9679795115.

The spelling of 68401861 in words is "sixty-eight million, four hundred one thousand, eight hundred sixty-one".