68181049 has 4 divisors (see below), whose sum is σ = 69336720. Its totient is φ = 67025380.

The previous prime is 68181019. The next prime is 68181053. The reversal of 68181049 is 94018186.

It is a happy number.

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 68181049 - 2⁵ = 68181017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 68180999 and 68181017.

It is not an unprimeable number, because it can be changed into a prime (68181019) 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, 577747 + ... + 577864.

It is an arithmetic number, because the mean of its divisors is an integer number (17334180).

Almost surely, 2^68181049 is an apocalyptic number.

It is an amenable number.

68181049 is a deficient number, since it is larger than the sum of its proper divisors (1155671).

68181049 is a wasteful number, since it uses less digits than its factorization.

68181049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1155670.

The product of its (nonzero) digits is 13824, while the sum is 37.

The square root of 68181049 is about 8257.1816620443. The cubic root of 68181049 is about 408.5274340653.

The spelling of 68181049 in words is "sixty-eight million, one hundred eighty-one thousand, forty-nine".