68014781 has 4 divisors (see below), whose sum is σ = 69461952. Its totient is φ = 66567612.

The previous prime is 68014763. The next prime is 68014783. The reversal of 68014781 is 18741086.

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 68014781 - 2⁶ = 68014717 is a prime.

It is a super-2 number, since 2×68014781² = 9252020868955922, 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 (68014783) 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, 723515 + ... + 723608.

It is an arithmetic number, because the mean of its divisors is an integer number (17365488).

Almost surely, 2^68014781 is an apocalyptic number.

It is an amenable number.

68014781 is a deficient number, since it is larger than the sum of its proper divisors (1447171).

68014781 is a wasteful number, since it uses less digits than its factorization.

68014781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1447170.

The product of its (nonzero) digits is 10752, while the sum is 35.

The square root of 68014781 is about 8247.1074323062. The cubic root of 68014781 is about 408.1950820414.

The spelling of 68014781 in words is "sixty-eight million, fourteen thousand, seven hundred eighty-one".