68912861 has 4 divisors (see below), whose sum is σ = 69167424. Its totient is φ = 68658300.

The previous prime is 68912843. The next prime is 68912863. The reversal of 68912861 is 16821986.

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 68912861 - 2⁶ = 68912797 is a prime.

It is a super-2 number, since 2×68912861² = 9497964822410642, which contains 22 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 (68912863) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 126875 + ... + 127416.

It is an arithmetic number, because the mean of its divisors is an integer number (17291856).

Almost surely, 2^68912861 is an apocalyptic number.

It is an amenable number.

68912861 is a deficient number, since it is larger than the sum of its proper divisors (254563).

68912861 is a wasteful number, since it uses less digits than its factorization.

68912861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254562.

The product of its digits is 41472, while the sum is 41.

The square root of 68912861 is about 8301.3770544410. The cubic root of 68912861 is about 409.9838601618.

The spelling of 68912861 in words is "sixty-eight million, nine hundred twelve thousand, eight hundred sixty-one".